Urban nature

 

 

Taiwan 2017a
Taiwan 2018
Taiwan 2017
Taiwan 2016
The Malayan night-heron (Gorsachius melanolophus) is fairly common in Taiwan. It is often seen in city parks, where it can become remarkably confiding. These four pictures are from Taichung. The upper picture shows a pair on a lawn in a park. The bird to the left is probably a male in breeding plumage, showing deep blue lores and a long crest, whereas the other bird presumably is a female, which is not yet sexually mature, or has retained the immature plumage – a character known from females of this species (see Chuan-Chiung Chang: Malayan Night Heron Gorsachius melanolophus breeding in immature plumage, Forktail 16 (2000), pp. 167-168). – Second picture from above shows a bird, foraging in a polluted stream, third from above a bird, sitting on its day-roost, a garden wall. The bottom picture shows a long-term parked car, where guano has dropped from a Malayan night-heron nest onto the windscreen. (Photos copyright © by Kaj Halberg)

 

 

Bornholm 2016a
Common orange lichen (Xanthoria parietina) is very common on rocks, large trees, roofs, walls, etc. It is one of the few lichens, which is favoured by eutrophication. – In this picture, it grows on tiles on a garden wall in the town of Svaneke, Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018
Taiwan 2018
Four subspecies of the brown shrike (Lanius cristatus) are breeding over much of eastern Asia, in most of Siberia, Mongolia, China, Korea, and Japan, spending the winter further south, in Tropical Asia. Further west, it is replaced by two sister species, the red-backed shrike (L. collurio) and the isabelline shrike (L. isabellinus). These pictures are from Taiwan, where the subspecies lucionensis is a common migrant and winter visitor. The upper picture shows a male, sitting on a wall, while in the lower picture, an immature bird is sitting in front of a blooming Taiwanese cherry tree (Prunus campanulata). (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2018
Mexican primrose-willowherb (Ludwigia octovalvis), growing at a river side in the city of Taichung, Taiwan. Despite its name, the native area of this plant, belonging to the evening-primrose family (Onagraceae), is unknown, and today it is found in most tropical and subtropical areas of the world, easily becoming naturalized. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2016a
Colony of house swifts (Apus nipalensis) on a residential building, Taichung, Taiwan. This species has a wide distribution, found from Nepal eastwards to Japan, south through Southeast Asia to Indonesia. Formerly, it was regarded as a subspecies of little swift (Apus affinis). (Photo copyright © by Kaj Halberg)

 

 

Jylland 2017b
White melilot, or white sweet clover (Melilotus albus), is a native of southern and eastern Europe, eastwards to Central Asia. In former days, it was cultivated in other parts of Europe, and in North America, as a fertilizing plant, as its root nodules – like with other members of the pea family – contain bacteria, which are able to fixate nitrogen from the air. When these bacteria die (and they are very short-lived), the plant can utilize the nitrogen. When the plant dies, the nitrogen is released into the soil, for other plants to utilize. It also makes excellent hay. The generic name, Melilotus, is from the Latin mel = honey, and lotus = a plant of the pea family, which, like the common name sweet clover, refers to the sweet smell of the plant, and to the fact that it is an excellent bee plant. – Today, although it is not cultivated anymore at a larger scale, white melilot has become widely naturalized in most temperate and subtropical areas of the world, especially in abandoned lots and along newly established roads. In this picture, it grows up a fence near Århus Railway Station, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018
Taiwan 2018b
Formerly, the common city swallows of South India, Sri Lanka, Southeast Asia, Indonesia, the Philippines, and Taiwan were regarded as belonging to the widespread Pacific swallow (Hirundo tahitica), but 7 subspecies have now been split to form a separate species, the house swallow (H. javanica). These pictures show the subspecies H. j. namiyei, which is very common in Taiwanese cities, and is also found on the Ryukyu Islands, southern Japan. (Source: hbw.com/species/house-swallow-hirundo-javanica). – These birds were photographed in the city of Taichung, Taiwan. The bird in the lower picture is sitting on a door lamp. (Photos copyright © by Kaj Halberg)

 

 

Taiwan_2017b_247
The native area of slender, or green, amaranth (Amaranthus viridis) is unknown, and today it is distributed in all warmer areas of the world. In Taiwan, where this picture was taken, it is very common in cities, especially in fallow areas, and along roads and embankments. Leaves as well as seeds are edible, and is a source of food in many parts of the world. In Australia, it was eaten during the 19th Century. In 1889, botanist Joseph Maiden (1859-1925) wrote: “It is an excellent substitute for spinach, being far superior to much of the leaves of the white beet sold for spinach in Sydney. Next to spinach it seems to be most like boiled nettle leaves, which when young are used in England, and are excellent. This amarantus should be cooked like spinach, and as it becomes more widely known, it is sure to be popular, except amongst persons who may consider it beneath their dignity to have anything to do with so common a weed.” (Source: T. Low, 1985. Wild Herbs of Australia & New Zealand. Angus & Robertson). – In India, slender amaranth is also utilized in traditional Ayurvedic medicine. (Photo copyright © by Kaj Halberg)

 

 

Sjælland 1969-2005
Sjælland 2012-16
Sjælland 2017
Formerly, the black-billed magpie (Pica pica) was a shy bird, fleeing people at long distances. Today, however, it is a common breeding bird in cities, where, under normal circumstances, people do not constitute a danger to the birds. – These three pictures are from Copenhagen, Denmark. – Magpie, sitting on a gravestone in a Jewish cemetery (top). – Young bird, sitting on the rail of a foot bridge across a canal (centre). – Magpie nest, built in a silver birch (Betula pendula) with thousands of catkins (bottom). (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2018
The native area of silver cockscomb (Celosia argentea), also called feathery amaranth, is unknown, but today it is found in most tropical and subtropical areas of the world. In numerous countries, it is regarded as an invasive plant, e.g. India, Japan, Ecuador (Galapagos Islands), Fiji, Taiwan, and the United States. The species is very common in Taiwanese cities, growing in abandoned plots, as here in Taichung. Downy bur-marigold (Bidens pilosa), likewise an invasive species, is also seen in the picture. – Read more about silver cockscomb on this website, see Traditional medicine: Celosia argentea. About downy bur-marigold, see Nature: Invasive species. (Photo copyright © by Kaj Halberg)

 

 

Taiwan_2018a_066
Taiwan 2018
Taiwan 2018
The tree sparrow (Passer montanus) has a huge distribution, from western Europe across Central Asia to Japan, and thence south through Southeast Asia to Indonesia and the Philippines. These pictures are from Taiwan, where the tree sparrow is very common and has taken over the role of the house sparrow (P. domesticus) as a city bird, as the latter is not found in Taiwan. The upper picture shows a flock, sitting on plastic tapes on the roof of a greenhouse. The centre picture shows tree sparrows, feeding on seeds of a Chinese tallow-tree (Triadica sebifera), and in the bottom picture, a bird is sitting on a dragon in a Daoist temple. – Read more about Chinese tallow-tree on this website, see: In praise of the colour red. About Daoism, see Religion: Daoism in Taiwan. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2018c
Virginian peppercress (Lepidium virginicum), also known as least pepperwort, belongs to the mustard family (Brassicaceae). All parts of this plant have a peppery taste, hence its common names. It is a native of North America, from southern Canada south to Mexico, but has been widely introduced to many other countries. It grows in open, drier places, and has readily adapted to a life in cities, as this plant, which has sprouted in a crack in an abandoned parking lot in the city of Taichung, Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Sjælland 1969-2005
Fyn 2009-13
Chukotka 2011
Tyrkiet 2006
Jylland 2013-15
Many gull species have readily adapted to a life in cities. During the latest 40 years, the herring gull (Larus argentatus) has increased significantly as a breeding bird in European cities, placing its nest on top of high-rise buildings. The two uppermost pictures are from Denmark, showing herring gulls feeding on scraps from a fishing vessel in Copenhagen (top), while another one is waiting for tidbits beside a fisherman, who is gutting fish in the harbour of Kerteminde, Funen (second from above). The third picture from above shows Vega gulls (Larus vegae), standing on the roof of a shed in Anadyr Airport City, Chukotka. This species is found in north-eastern Siberia, from the Lena River, east to the Bering Sea. Second picture from below shows a western yellow-legged gull (Larus michahellis), which has just killed a domestic pigeon and is now eating it on a roof top in Istanbul, Turkey. The gull shows a threatening attitude towards an intruding hooded crow (Corvus cornix), which is very interested in the kill. The bottom picture shows black-headed gulls (Chroicocephalus ridibundus), resting on a boat in a harbour in Jutland, Denmark. The bird in front is wearing a numbered plastic ring. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2018
Vegetation at a sewage outlet, Taichung, Taiwan. The plant with large leaves is Japanese dock (Rumex japonicus), the one with white flowers is downy bur-marigold (Bidens pilosa), and the one with yellow flowers is Mexican primrose-willowherb (Ludwigia octovalvis). – Read more about downy bur-marigold on this website, see Nature: Invasive species. (Photo copyright © by Kaj Halberg)

 

 

Sjælland 1969-2005
Sjælland 1969-2005
Dandelion (Taraxacum officinale) readily grows in cracks in asphalt and between flagstones. Both these pictures are from Copenhagen, Denmark, growing outside the Carlsberg Breweries (top), and among wood chips, spread out along a street (bottom). – Read more about this species on this website, see Traditional medicine – Taraxacum officinale. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2012a 
Sunshine, reflected as colours in a spider’s web, Anping Tree House, Anping, Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Bali 2015
Taiwan 2018a
Taiwan 2017b
Swollen fingergrass (Chloris barbata) and lantern tridax (Tridax procumbens) – the latter belonging to the daisy family (Asteraceae) – are both very common in Asiatic cities. Swollen fingergrass is a native of Tropical Africa, whereas lantern tridax is native to Tropical America. Both species, however, have been accidentally introduced to many other parts of the world. In the upper picture, both grow together along a street in the town of Ubud, Bali, Indonesia. The centre picture shows a tuft of swollen fingergrass, which has taken root in a crack in the asphalt in an abandoned parking lot in Taichung, Taiwan, whereas the lower picture shows a large growth of lantern tridax along a street, also in Taichung. (Photos copyright © by Kaj Halberg)

 

 

Bornholm 1977-96
Taiwan 2018
Yunnan 2007
Nepal 2009a
There are altogether eleven subspecies of the white wagtail (Motacilla alba), breeding from East Greenland in the west to Alaska in the east, and south to Morocco, Iran, the Himalaya, and Taiwan. The nominate race, alba, is found from East Greenland, via Iceland and the entire Europe, apart from the British Isles, and further east, almost to the Ural Mountains. In the British Isles, it is replaced by the race yarrellii, in Morocco by subpersonata, and in the Ural Mountains, south to the Caspian Sea, by dukhunensis. In Siberia and western Alaska, the race ocularis is breeding, in Iran persica, in the western part of Central Asia personata, in Central Asia baicalensis, in the Himalaya alboides, in China, Korea and Taiwan leucopsis, and in Japan, Sakhalin and Kamchatka lugens. Many of the northern races are migratory, while the southernmost are resident. This species is confiding, often breeding in buildings. The upper picture shows a male of the nominate race, M. a. alba, photographed on the island of Christiansø, Bornholm, Denmark. Red roof tiles are seen in the background. Second picture from above shows an Amur wagtail (M. a. leucopsis) on a concrete wall along a river in the city of Taichung, Taiwan, second from below a male Himalayan wagtail (M. a. alboides), sitting on a dilapidated wall in Hutiao Xia (Tiger Leaping Gorge), Jinsha River, Yunnan Province, China. The bottom picture shows a male masked wagtail (M. a. personata), stretching a wing on a boat, Phewa Lake, Pokhara, Nepal. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2013
‘Long-term’ parked car in the city of Taichung, Taiwan, overgrown by various plants, e.g. obscure morning-glory (Ipomoea obscura), a climber of the pea family with chocolate-brown flowers, and downy bur-marigold (Bidens pilosa), an invasive species, which is abundant in Taiwan (the plant with white ray-florets). – Read more about obscure morning-glory and other members of the morning-glory family on this website, see Plants: The morning-glory family. About downy bur-marigold, see Nature: Invasive species. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018
Taiwan 2018b
In most of its distribution area, the grey, or Himalayan, treepie (Dendrocitta formosae) is a rather shy forest bird, mainly found in montane areas. In Taiwan, however, it lives almost down to sea level, often in city parks, where it has become accustomed to people. In the upper picture, from the city of Taichung, a treepie is feeding on seeds of a Chinese tallow-tree (Triadica sebifera), and the bird in the lower picture, from Tunghai University Park, Taichung, is eating bread. – Read about the Chinese tallow-tree on this website, see: In praise of the colour red. (Photos copyright © by Kaj Halberg)

 

 

Bornholm 2008 
Barren brome (Bromus sterilis) is a very common grass species, native to Europe, North Africa, and West and Central Asia. It often grows in cities, here photographed next to a red house wall in the town of Svaneke, Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018a
Taiwan 2018a
The castor oil plant (Ricinus communis) is probably indigenous to the Middle East and north-eastern Africa, but has been widely cultivated elsewhere for thousands of years. Today, it is a widespread weed in almost all tropical and subtropical areas. It is extremely common in the lowlands of Taiwan, also in cities, as in these pictures from Taichung. In the upper picture, a castor oil plant with ripe fruits is growing in an abandoned plot, while in the lower one, a plant has taken root in a crack along a rainwater drainage canal. The latter is flowering, having red female flowers above, white male flowers below. Another name of this species is Palm of Christ, which refers to the ability of the oil of the plant to heal wounds and cure ailments. The generic name Ricinus is Latin for tick, referring to the seed, which resembles certain species of ticks. – Read more about the castor oil plant on this website, see Traditional medicine: Ricinus communis. (Photos copyright © by Kaj Halberg)

 

 

Jylland 2016
Taiwan 2018b
Shepherd’s-purse (Capsella bursa-pastoris), which is a native of western Asia and Europe, has become naturalized almost worldwide in temperate and subtropical areas. It is also called shepherd’s bag, shepherd’s scrip, shepherd’s sprout, lady’s purse, witches’ pouches, rattle pouches, case-weed, pick-pocket, pick-purse, blindweed, pepper-and-salt, poor man’s pharmacettie, and mother’s heart. Most of these names, as well as the specific name, refer to the shape of the fruits, or siliques, which are flat and triangular, resembling an old-fashioned bag or purse. An Irish name of the species, clappedepouch, refers to the long-stalked siliques. This name was given in allusion to the begging of lepers, who would ring a bell, or a clapper, receiving their alms in a cup at the end of a long pole, to avoid people being infected. – In the upper picture, a shepherd’s-purse is growing in a crack along a sidewalk in Denmark, and the lower picture shows a large growth in Tunghai University Park, Taichung, Taiwan. – Read more about this species on this website, see Traditional medicine – Capsella bursa-pastoris. (Photos copyright © by Kaj Halberg)

 

 

Europa 1972-2005
In severe winters, many starving water birds gather in harbours, where conditions are often less harsh. This woman is feeding various bird species, such as mute swans (Cygnus olor), coots (Fulica atra), tufted ducks (Aythya fuligula), black-headed gulls (Chroicocephalus ridibundus), and feral pigeons (Columba livia). – Lausanne, Switzerland. (Photo copyright © by Kaj Halberg)

 

 

Four yellow-flowered members of the composite family (Asteraceae) are common in Taiwanese cities, all presented below. Three of these species, which are native to eastern Asia, are quite similar, having small flowerheads and more or less flat leaves, while the fourth is easily recognized by its large, thistle-like leaves.

 

Taiwan 2018a
Taiwan 2018b
The stem of the Oriental false hawksbeard (Youngia japonica), also called Japanese hawksbeard, is usually tall, erect, and unbranched, with numerous small flowerheads at the top. Its basal leaves are quite broad, more or less hairy, and mostly deeply lobed or pinnately divided. The flowerheads are up to 8 millimetres across. In Taiwan, it tends to grow under tree cover, and in cities it is mostly found in parks, as these, forming a large growth. Today, this species has spread to most warmer areas of the world. (Photos copyright © by Kaj Halberg)

 

Taiwan 2018a
The rabbit milkweed (Ixeris chinensis) can be identified by its mostly linear, rather narrow leaves and pale yellow flowerheads, which are up to 2 centimetres across. It is very common in all types of open areas, such as grasslands, forest margins, shrublands, riverbanks, field margins, wastelands, and roadsides. This one grows along a sidewalk in the city of Taichung. (Photo copyright © by Kaj Halberg)

 

Taiwan 2018
The basal leaves of Ixeridium laevigatum are very variable, mostly with rather large lobes, but sometimes being almost entire, while the stem leaves are mostly linear and rather narrow. The flowerheads are up to 1 centimetre across. In Taiwan, this species is very common in urban areas. This one grows beneath a tree on a sidewalk, together with a species of mugwort (Artemisia). (Photo copyright © by Kaj Halberg)

 

Taiwan 2018a
Bornholm 2016
The common sow-thistle (Sonchus oleraceus) is native to Europe and western Asia, but has spread to most other areas of the world. It is regarded as an invasive plant in many countries, e.g. in Australia, where it is a serious problem in crops. It is easily identified by its slightly prickly, deeply divided leaves. The generic name Sonchus is a Latinized form of the Greek word sonchos, the ancient name for sow-thistles, while oleraceus is from the Latin oleris, meaning ‘edible herbs’. Young leaves can be eaten as salad or cooked like spinach. The common name refers to the fact that pigs like to eat this plant, and to the leaves, which resemble young thistle leaves. In the upper picture, a sow-thistle grows in a park in the city of Taichung, Taiwan, while the one in the lower picture has taken root along a house wall in the town of Rønne, Bornholm, Denmark. (Photos copyright © by Kaj Halberg)

 

 

 

Indien 2003
Indien 2003
Like a bunch of street urchins, these southern plains langurs (Semnopithecus dussumieri) are sitting on a roof top in the city of Pushkar, Rajasthan, India, from where they survey the surroundings for fruit or other edibles to steal (top). The lower picture shows langurs, resting in a pavilion near the sacred lake in Pushkar. – Read more about langurs, as well as many other monkeys, elsewhere on this website, see Animals: Monkeys and apes. (Photos copyright © by Kaj Halberg)

 

 

Jylland 2013-15
As its specific name maritima implies, thrift (Armeria maritima) is a seashore plant. However, following the introduction of salt-strewing on snow-covered roads, this species has spread inland, where it is now common along roads. This one is growing in a crack in a pavement, Jutland, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2016a
The potato tree (Solanum erianthum), a species of nightshade, is a native of North and Central America, but has been introduced to numerous other countries, in many areas considered an ‘environmental weed’. In Taiwanese cities, it is very common, often growing on vacant lots, and in cracks along house walls and water courses. This one was photographed in an abandoned house plot in Taichung. (Photo copyright © by Kaj Halberg)

 

 

Europa 1972-2005 
The great crested grebe (Podiceps cristatus) is a water bird with a very wide distribution, from the British Isles, across temperate regions of Eurasia, eastwards to China. Furthermore, it is found around the Mediterranean, and with isolated populations in southern Africa and Australia. The species has adapted to a life in harbours, as this one in Enkhuizen, West-Friesland, Holland. (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2008
Red sand-spurrey (Spergularia rubra, left) and procumbent pearlwort (Sagina procumbens) are both small plants of the pink family (Caryophyllaceae). They are common weeds in fallow fields and along roads, and both have adapted to a life in cities, here growing in a crack on a sidewalk in the town of Gudhjem, Bornholm, Denmark. Both species are native to Europe and Northern Asia, but have been accidentally spread to many other parts of the world. (Photo copyright © by Kaj Halberg)

 

 

Europa 1972-2005
Old wall with vegetation of a fern species, the wall-rue (Asplenium ruta-muraria), and common orange lichen (Xanthoria parietina), Enkhuizen, West-Friesland, Holland. (Photo copyright © by Kaj Halberg)

 

 

Fanø 2001-12 
Formerly, the wood pigeon (Columba palumbus) was a shy forest bird, but in later years it has adapted to a life in cities, where it is now very common. This species is found all over Europe, the Middle East, and Morocco, with isolated populations in Central Asia and the western part of the Himalaya. – This bird is sitting on a chimney on the island of Fanø, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2011
Near the city of Hsinchu, northern Taiwan, this vine is climbing up a wall, which is decorated with local Lin tribal art, a mosaic, depicting fighting goats. – More pictures of Taiwanese tribals and their artwork may be seen on this website, see Gallery: People – Tribals of Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Filippinerne 1984
Many cockroach species have adapted to a life in cities, where they are often an immense nuisance. – Bontoc, Luzon, Philippines. (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2016a
The long-headed poppy (Papaver dubium) is very common all over Europe, where it mostly grows along roads and in fallow fields. – This one, however, is growing in a crack along a house wall on the island of Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Indien 1994
Indien 1994 
In Deshnok, Rajasthan, India, a local goddess, Karna Mata, is considered to be an incarnation of the great goddess Durga. Her followers believe that if you are reborn as a rat, you escape the wrath of Yama, the God of Death. For this reason, rats are sacred, and in a temple, Karna Mata Mandir, pilgrims feed a horde of black rats (Rattus rattus). (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2016
The spotted dove (Streptopelia chinensis) is very common in Taiwanese cities. Here, a pair is sitting on the rail of an apartment balcony in a skyscraper in Taichung. This species is widely distributed in Asia, from the Indian Subcontinent east to China, Taiwan, and the Philippines, south through Southeast Asia to Indonesia. (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2016a
Due to its pretty flowers and vigorous growth, ivy-leaved toadflax (Cymbalaria muralis) – which is a native to the Mediterranean – has been introduced to many parts of the world as an ornamental. In some areas, however, it has escaped cultivation and has become an invasive. – This one is growing on a stone wall on the island of Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Indonesien 1985
Geckos of the genus Hemidactylus are often called house geckos, as many of the species have adapted to a life inside houses. They are native to most tropical areas of the world, and a few species are also found in subtropical parts of Europe and Africa. Presently, about 90 species are known, with new species being described every few years. – This one was photographed on a house wall in Bali, Indonesia. (Photo copyright © by Kaj Halberg)

 

 

Jylland 2006-12 
Greater plantain (Plantago major) is native to Europe and Temperate Asia, but has been introduced to many parts of the world, often becoming naturalized. When the Europeans emigrated to North America, the sticky seeds of this species often stuck to wagon wheels, thus spreading it, wherever the immigrants went. This was noticed by the indigenous peoples, who called it ‘white man’s footprint’. – In this picture, a greater plantain grows in a crack in a gutter, Jutland, Denmark. The red leaf is a rose petal. (Photo copyright © by Kaj Halberg)

 

 

Nordindien 1991
Varanasi 2008
Varanasi 2008
The rhesus monkey (Macaca mulatta) is found in a wide variety of habitats, including cities, where it is often very common. This one is walking along a narrow wall, surrounding the Hawa Mahal Palace in Jaipur, Rajasthan, India (top), while this one is sitting on a balcony in front of a residential home in Varanasi, India (centre), and this one is jumping from one house wall to another in Varanasi (bottom). – Read more about the rhesus monkey, as well as many other monkeys, elsewhere on this website, see Animals: Monkeys and apes. (Photos copyright © by Kaj Halberg)

 

 

Europa 1972-2005
Europa 1972-2005
The grey heron (Ardea cinerea) has a very wide distribution, found in Europe, most of Asia and Africa, and Madagascar. In former days, the grey heron used to be very shy, but in later years it has adapted to a life in cities. This one was encountered in the harbour of Enkhuizen, West-Friesland, Holland. – Another picture of grey heron is found on this website, see: Fishing. (Photo copyright © by Kaj Halberg)

 

 

Taiwan_2018_028
From a bed of cultivated angled luffas (Luffa acutangula) in the city of Taichung, Taiwan, several plants have climbed up a fence, whereby their fruits are out of reach for the owner. (Photo copyright © by Kaj Halberg)

 

 

Jylland 2013-15 
Disc mayweed (Matricaria discoidea) is native to North America and north-eastern Asia, south to Hokkaido, Japan. Today, however, it has been accidentally introduced to most other areas of the world, where it is a common weed, growing in open areas. Other names of the plant are wild chamomile and pineapple weed, due to its chamomile- or pineapple-like smell, when crushed. In this picture, disc mayweed is growing in a crack in a gutter, Jutland, Denmark. The white object is a bird feather. (Photo copyright © by Kaj Halberg)

 

 

Nepal 2002
Formerly, the large-billed crow (Corvus macrorhynchos) was called ‘jungle crow’, including two other crows, which are today treated as separate species, the Indian jungle crow (C. culminatus) and the eastern jungle crow (C. levaillantii). Despite these splits, the large-billed crow still has a very wide distribution, found from Afghanistan in the west, across the Himalaya and Tibet to northern China, south-eastern Siberia, and Taiwan, south through Southeast Asia to Indonesia and the Philippines. In the Indian Subcontinent, it is generally found at higher elevations than the Indian jungle crow. The large-billed crow often lives near human habitation. This one is sitting on a house roof in the town of Namche Bazaar, Khumbu, eastern Nepal. (Photo copyright © by Kaj Halberg)

 

 

Nordindien 1985-86
The five-striped palm-squirrel (Funambulus pennantii) is native to south-eastern Iran and to the Indian Subcontinent, south to the state of Karnataka. It has been introduced to New Guinea and to many Pacific islands, and in Australia, a population is found in the city of Perth, established from zoo escapes. It is very common in North Indian cities, even metropoles like Delhi and Kolkata. This picture is from the town of Jaisalmer, Rajasthan. (Photo copyright © by Kaj Halberg)

 

 

Jylland 2013-15
Common storksbill (Erodium cicutarium), growing at a house wall, Jutland, Denmark. This species is native to Europe, North Africa, and parts of Temperate Asia, but has been accidentally introduced to many parts of the world, e.g. North America, Australia, New Zealand, Japan, and Chile. In many places, it is considered a noxious weed, as it is most proliferate, readily outcompeting native plant species and crops. The ripe fruit splits into five segments, each with a long, spirally twisting style, with a seed attached at the base. As the style twists, it is able to drill the seed into the soil. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2013
This grass is finding its way through a hole in a discarded car, where the rear light glass is missing. – Taichung, Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Jylland_2013-15_442_resize
Herb Robert (Geranium robertianum) is native to most of Europe, North Africa, western Asia, and parts of North America. It was once known as Saint Robert’s herb, named after a French monk, who lived around 1000 A.D. He cured people, suffering from various diseases, using this plant. American native tribes also used this herb medicinally. In this picture, the red-stemmed variety, var. rubricaule, is growing abundantly along railroad tracks in the city of Aarhus, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Myanmar 2007
Nepal 1985
The house crow (Corvus splendens) is an extremely common bird in the Indian Subcontinent, southern Iran, and Myanmar, but today it has spread to many cities in Asia and Africa, arriving as ‘blind passengers’ on board ships. It is also found in a few coastal towns of Europe and North America. The upper picture shows house crows, resting on a rail around the golden Lawkananda Pagoda in Bagan, Myanmar. In the lower picture, two birds are inspecting the remains of a butchered water buffalo in Kathmandu, Nepal. (Photos copyright © by Kaj Halberg)

 

 

Sjælland_69-05_141a_resize
Common mugwort (Artemisia vulgaris) is native to most of Temperate Europe and Asia, North Africa, and Alaska. In other areas of North America, it has become naturalized. Originally, this species was a plant of grasslands and sandy beaches, but it readily spreads to fields, where it is a noxious weed. In China, it is used as a substitute for Artemisia argyii to make moxa, which is much utilized as a healer in traditional Chinese medicine. – In this picture, common mugwort is growing near a canal in Copenhagen, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Sjælland 2006-11 
In 1984, the mute swan (Cygnus olor) was elected the national bird of Denmark – an appropriate choice, as the species is very common. This one is nesting on a pontoon in a canal, oblivious of a passing tourist boat. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2012
Obscure morning-glory (Ipomoea obscura), climbing along barbwire in the city of Taichung, Taiwan. – Read more about this species and other members of the morning-glory family on this website, see Plants: The morning-glory family. (Photo copyright © by Kaj Halberg)

 

 

 

United Kingdom 1992-2002
Sjælland 1969-2005
In city parks, greylag geese (Anser anser) often become very tame. This child is feeding geese between bars in a fence, surrounding St. James’ Park, London (upper picture). When they have goslings, greylag geese have become so bold that they will often threaten passing people. This male goose in a city park in Copenhagen, Denmark, is hissing at me because of the goslings in the foreground (bottom picture), but is itself being threatened by a male mute swan (Cygnus olor). (Photos copyright © by Kaj Halberg)

 

 

Sjælland 2012-15
Great willow-herb (Epilobium hirsutum), growing along railroad tracks, Zealand, Denmark Lådden dueurt (Epilobium hirsutum), voksende langs jernbanespor, Køge Jernbanestation, Sjælland
Rosebay willow-herb (Chamerion angustifolium) and great willow-herb (Epilobium hirsutum), both belonging to the family Onagraceae, are plants, which readily invade disturbed areas. Rosebay willow-herb is mainly a colonizer of forests clearings and abandoned fields, while great willow-herb prefers more humid areas, e.g. water-logged fields and along streams. An excellent example of the ability of rosebay willow-herb to completely take over newly abandoned fields can be studied on this website, see Vorsø on my mind: Expanding wilderness. – In these pictures, rosebay willow-herb (above) and great willow-herb have both sprouted between railroad tracks in the town of Køge, Zealand, Denmark. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2013
A species of sagebrush (Artemisia), growing along a busy street, Taichung, Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Skandinavien 2001-14
Red fescue (Festuca rubra) is a very adaptable grass, which can grow in most open habitats, including beaches and dunes. It has also adapted to a life in cities, as this group, growing along a water front at Lake Mälaren, central Stockholm, Sweden. (Photo copyright © by Kaj Halberg)

 

 

Sydindien 2000-01
Sydindien 2000-01
Like the rhesus monkey (Macaca mulatta) of North India, the South Indian bonnet macaque (M. radiata) is common in cities, especially around Hindu temples, where they eat offerings of rice and flowers, often becoming obese, as this one, resting on a sculpture of an elephant in the Sri Minakshi Temple, Madurai, Tamil Nadu (top). – This street performer in the city of Tirumalai, Andhra Pradesh, has caught two young bonnet macaques, training them to perform (bottom). They seem to be arguing about something. – Read more about the bonnet macaque, as well as many other monkeys, elsewhere on this website, see Animals: Monkeys and apes. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2012a
Aerial roots of a giant large-leaved fig (Ficus superba), climbing over the remains of the former warehouse of Tait & Co., Anping, Taiwan. Today, the building is called Anping Tree House. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2016a
Taiwan 2009
The light-vented bulbul (Pycnonotus sinensis) is very common in Taiwanese cities. The upper picture shows a bird, surveying its surroundings from the top of a white leadtree (Leucaena leucocephala). – Read more about light-vented bulbul as well as white leadtree elsewhere on this website, see Nature: Invasive species. (Photos copyright © by Kaj Halberg)

 

 

Taiwan 2013
Balloon vine (Cardiospermum halicacabum) – also called heart pea or love-in-a-puff – is a climber, here clinging to barbwire in Taiwan, where it is very common. It is easily recognized by its swollen fruits, and its tiny seeds are black with a white spot, shaped like a heart, hence its generic name, as well as its common name heart pea. – Read more about this species on this website, see Traditional medicine – Cardiospermum halicacabum, as well as Nature: Invasive species. (Photo copyright © by Kaj Halberg)

 

 

United Kingdom 1992-2002
Taiwan 2017
Taiwan 2017
In city parks, squirrels often become very tame. In the upper picture, a man is feeding an eastern grey squirrel (Sciurus carolinensis), as well as feral pigeons, in Kew Botanical Gardens, London. This species is the most widespread squirrel in North America, but has also been successfully introduced to South Africa, Britain, and other places. In Britain, it has become a pest, as it competes with the native European red squirrel (Sciurus vulgaris), which is now scarce south of Scotland. – The two lower pictures show Taiwan squirrels (Callosciurus erythraeus ssp. taiwanensis) in the city of Tainan, southern Taiwan. Near the Confucius Temple, people are feeding birds, causing the otherwise rather shy squirrels to have become remarkably tame. – Read more about grey squirrels, and other North American squirrels, on this website, see Animals: Squirrels of North America. (Photos copyright © by Kaj Halberg)

 

 

Varanasi 2008
The colourful pied myna, or Asian pied starling (Gracupica contra) is a bird of the northern part of the Indian Subcontinent and Southeast Asia. This one is feeding among washed-up marigold garlands, which have been brought as an offering to the sacred Ganges River, Varanasi, India. (Read more about the Ganges River, and about Hinduism in general, on this website, see Religion: Hinduism). (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2008a
Stonecrops (Sedum) are creeping plants, which store water and nutrients in their succulent leaves, thus being adapted to a life in dry surroundings, such as rocks and sandy areas. This picture shows biting stonecrop (Sedum acre), growing in a crack between granite steps in the town of Rønne, Bornholm, Denmark. This species is named after the bitter, peppery taste of its leaves, caused by their content of slightly toxic alkaloids. (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2016a
United Kingdom 1992-2002
In later years, the house sparrow (Passer domesticus) has declined drastically in large parts of Europe, whereas it is very common in North America, where it was introduced several times between 1851 and 1875. Today, it is regarded as a serious crop raider in large parts of North America. – Male house sparrow, sitting on a roof, Bornholm, Denmark (top). Hand-feeding house sparrows in St. James’ Park, London (bottom). (Photos copyright © by Kaj Halberg)

 

 

Bornholm 2008b 
Common mallow (Malva sylvestris) is a native of Temperate Asia, Europe, and North Africa. It has been introduced to many countries as an ornamental and has become naturalized in e.g. Australia, the United States, Canada, and Mexico. – In this picture, it grows on a graveyard wall near Nylars Church, Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Varanasi 2008
The bank myna (Acridotheres ginginianus) is a common bird in North Indian cities. This one is preening by taking ants in its bill, gleaning its feathers with them. Presumably, the purpose of this behaviour is to kill pests with the formic acid. – Ganges River, Varanasi, India. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2012 
Paper mulberry (Broussonetia papyrifera), growing near a playground, Taichung, Taiwan. This species is very common in Taiwanese cities, popping up in cracks everywhere. – Read more about this species on this website, see Nature: Invasive species. (Photo copyright © by Kaj Halberg)

 

 

Europa 1972-2005
The common coot (Fulica atra), a widespread water bird of Eurasia, Africa, and Australia, has adapted to a life in cities, here in Enkhuizen, West-Friesland, Holland. This bird has built a nest in a canal, made from twigs, water plants, and plastic bags. (Photo copyright © by Kaj Halberg)

 

 

Jylland 2006-12 
Usually, the marsh cudweed (Gnaphalium uliginosum) is a plant of humid areas, such as water-logged fields, but it is also able to thrive in dry areas, such as these (the greyish-green plants), growing among cobble stones on a sidewalk in Jutland, Denmark. Also seen in the picture are greater plantain (Plantago major) and annual meadow-grass (Poa annua). (Photo copyright © by Kaj Halberg)

 

 

Filippinerne 1984
The tokay gecko (Gekko gecko), which is found on the Indian Subcontinent, and in Southeast Asia, the Philippines, Indonesia, and Melanesia, is often encountered in houses in Southeast Asia, easily identified by its loud call, rendered as ‘geck-oo’ or ‘tuc-too’. This picture is from the island of Mindoro, Philippines. – Read more about this species on this website, see Traditional medicine – Gekko gecko. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018b
Taiwan 2016
The downy bur-marigold (Bidens pilosa), also called blackjack, is a pan-tropical and -subtropical weed of unknown origin, which in many places has become a pest, often expelling native plant species. (See Nature: Invasive species.) It readily spreads by its hooked seeds, which attach themselves to a passing animal’s fur, or people’s socks. This way of seed dispersal has given it names like beggarticks, stickseed, farmer’s friend (ironic!), needle grass, Spanish needles, and stick-tight. These pictures are from Taiwan, where this species is extremely common, often covering huge areas. In the upper picture, it grows up a fence, while the lower picture shows a plant, which has taken root between two road dividers. (Photos copyright © by Kaj Halberg)

 

 

Sjælland 2006-11
Bornholm 2008a
Wall barley, or false barley (Hordeum murinum), is native to Europe, North Africa, and western Asia. It has readily adapted to a life in cities. In these two pictures from Denmark, its pale spikes stand out against house walls in the village of Jyllinge, Zealand (top), and in the town of Rønne, Bornholm. (Photos copyright © by Kaj Halberg)

 

 

Jylland 2017b
Formerly, as its name implies, goutweed (Aegopodium podagraria) was used as a medicinal herb to treat gout, and also arthritis. As far back as Ancient Rome, and throughout the Middle Ages, young goutweed leaves were utilized as a vegetable, much as spinach was used. Goutweed is native to southern Europe and western Asia, but was introduced to northern Europe. As early as the Middle Ages. It has also been accidentally introduced to North America, and almost everywhere it has become a most annoying garden weed. In this picture, goutweed is growing out through a beech hedge, alongside a pavement. – Jutland, Denmark. (Photo copyright © by Kaj Halberg)

 

 

(Uploaded June 2016)

 

(Revised continuously)