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Tag Archives: birds
Pigeons
Sorrento Center, Italy, Sept/ Oct 2014. Copyrights Stefan F. Wirth
Posted in Uncategorized
Tagged animals, Aves, birds, black and white, bw, Center, grey, Italy, october, pigeons, September, Sorrento, Stefan F. Wirth, Tauben, town, urban, waiting
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Eurasian coot breeding
http://www.youtube.com/watch?v=ucnmbyW-Uog&feature=plcp
The Eurasian coot belongs to the rails (Rallidae) and is within this taxon related to the crakes and gallinules.
This coot is very common and lives in and around waters such as ponds, stream pools and lakes. It prefers nutrient-rich water and is quite flexible concerning other aspects of its environments. Ideally it favours a mixture of reeds, smaller mounds, wet grasslands and bushes.
The specimens presented here were filmed in the big pond of the Charlottenburg Palace in Berlin, Germany.
Only the area in the front of the parkway is artificially controlled. The bigger backyard including this pond mostly consists of naturally grown biotopes. Nymphaea covers parts of the water surface.
The coots begin often already breeding around April and can repeatedly breed afterwards (a second, rarely also a third and a fourth time). Also a first brood can instead of March or April finally only happen in July or August. Both genders are involved in breeding, but in different intensities. Females breed more often, while males usually construct the breeding nest and additionally also several rest nests.
The juveniles are precocial animals and are after several days able to swim. Some of the young birds fellow the female for a while, others are fixed on the male at the same time. The adults feed their offspring (visible in the film). Often the adults only care about those juveniles, which use to fellow them regularly. Here I observed both parents occasionally feeding the same juvenile alternating. The observed birds mostly fed on mouldering plant material such as rotting leafes from the ground of the pond (“feeding from the bottom”). Also a juvenile was observed trying the “feeding from the bottom”-behavior. It was diving under awkwardly (visible in the film) due to its lack of experience. Generally the Eurasian coot has a wider range of food. It also feeds on live plants from the riparian vegetation, small fishes and molluscs.
During the period of filming in the middle of July 2012 a female was breeding its eggs at the same time when another couple had already older juveniles (both situations visible in the film).
Adults and older youngsters got together only in the evenings (obviously over the night) and met presumably not in the original brood nest, but in one of the rest nests, which were constructed rather by the male than by the female. There the interesting behavior of “hudern” (= german for “to gather under the wings”) could be observed when it began to rain in the evening at about 19:00 pm (visible in the film).
Posted in Uncategorized
Tagged backyard, behavior, Berlin, biotopes, birds, Blässhuhn, Blässralle, breeding behavior, brood nest, Brutnest, Brutverhalten, Charlottenburg palace, Eurasian coot, evolution, feeding from the bottom, Fulica atra, gründeln, hudern, juvenile birds, nest, nest-building, Nestbau, Nestflüchter, Nymphaea, park, pond, precocial animals, rails, Rallidae, rest nest, Ruhenest, Schloß Charlottenburg, See, Seerosen, Stefan F. Wirth, Stefan Wirth, teich, to gather under the wings, Wasservögel, waters, wirthstef
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Cantareira, urban Atlantic Forest
http://www.youtube.com/watch?v=HrYtWcFTOmQ&feature=plcp
The Serra da Cantareira is a mountainous region in the north of the city São Paulo (Brazil, State São Paulo). Parts of this Serra extend over a plane of 7.916 Hektar and represent an urban rest of the native Atlantic forest. The Parque Estadual da Cantareira is a strictly protected natural reserve.
One of the most spectacular native animals is the Southern Brown Howler Monkey (Alouatta guariba clamitans). This species lives in the fragmented areas of the Atlantic coastal forests. The monkeys sit mostly in crowns of big trees, often Araucaria trees, and are not easily visible, especially, when there is only a limited time for the visit of this park. Therefore unfortunately only one specimen is shortly visible in the end of the film.
The park area contains endangered plant and animal species, some are endemic.
The park is opened for the public, but an entrance fee is required. Bigger and partly smaller forest trails enable a more or less easily moving forward. Monkeys and birds are more often better audible than visible. It’s generally necessary to invest time and patience to discover bigger animal specimens. I unfortunately had only half a day. Butterflies, diverse other insects and Nephila spiders and dragonflies were easily observed. Nasua, Puma and Sloths by contrast could not be detected.
The park is characterized by many springs, streams and a waterfall. The Parque Estadual da Cantareira represents one of the biggest native urban forests in the world besides areas such as the Pedra Branca in Rio de Janeiro or the Sanjay Gandhi National Park in Mumbai.
Since years, the park is obviously endangered e.g. due to the illegal use of adjacent areas.
Posted in Uncategorized
Tagged Alouatta guariba clamitans, Araucaria, Atlantic forest, biodiversity, birds, butterflies, Cantareira, coastal forest, dragonfly, endangered species, endemic species, evolution, Nasua, natural reserve, Nephila, orb web spiders, Parque Estadual da Cantareira, Puma, rainforest, São Paulo, Schmetterlinge, Serra da Cantareira, Sloths, Southern Brown Howler Monkey, spiders, Stefan F. Wirth, Stefan Wirth, subtropical forest, urban forest, wirthstef
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