Tickled fan tail
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Barrel fan tail, Northern Territory, Australia |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Rhipidura isura | ||||||||||||
| Gould , 1841 |
The barbed fan tail ( Rhipidura isura ) is a songbird from the family of the fan tails (Rhipiduridae), which occurs from New Guinea to Australia. Compared to the two species common garden fan tail and fox tail , which are also found in Australia , this species has not yet been researched very much.
The populations of the barbed fan tail are not considered endangered in its entire area of distribution. Several subspecies are distinguished. A particularly large number of subspecies occur on the islands of the Bismarck Archipelago .
features
Between the sexes of Strichelfächerschwanzes is neither in the plumage coloration still in Build a dimorphism .
It reaches a body length of 16 to 18.5 cm. The beak is 15.3-18.6 mm long. It has a wing length of 73–91.5 mm, its tail measures 78–96 mm. The weight is between 10 and 15 g.
The head and neck of the adult birds are dark gray. The reins and the ear covers are a little darker and contrast strikingly with the white chin and throat and the fine, white line above and in front of the eye. The rest of the top of the body is dark gray with slightly darker and brown wings and tail plumage that is also colored. A wide gray chest band with short whitish lines and step-shaped spots runs across the chest, the belly is isabel-colored, the flanks, on the other hand, are dark gray. The outermost pair of control springs is half white on the underside, the dark gray basal half is lined with white.
The beak is black, the iris is black-brown. The legs and feet are dark gray to black.
Young birds are similar to adult birds, only the wing covers have isabel-colored tips.
Distribution area of the individual subspecies
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A number of subspecies are distinguished for the line fan tail:
- R. i. vidua Salvadori & Turati, 1874 - Kofiau, an island off the west coast of New Guinea.
- R. i. gularis S. Müller, 1843 - Gebe, an island off the west coast of New Guinea and islands in Cenderawasih Bay and islands in Torres Strait .
- R. i. nigromentalis EJO Hartert, 1898 - Louisiade Archipelago , a group of islands in the extreme southeast of Papua New Guinea . The archipelago comprises around 90 islands and has a total area of 1600 km².
- R. i. niveiventris Rothschild & EJO Hartert, 1914 - Admiralty Islands , which belong to the Bismarck Archipelago and form a group of islands in the Pacific Ocean northeast of New Guinea.
- R. i. mussai Rothschild & EJO Hartert, 1924 - St. Matthias Islands , a group of around 10 volcanic islands , located north of New Britain in the Bismarck Archipelago .
- R. i. setosa (Quoy & Gaimard, 1830) - Lavongai , New Ireland and Dyaul in the Bismarck Archipelago.
- R. i. gigantea Stresemann, 1933 - TTabar Islands and Lihir Islands in the Bismarck Archipelago.
- R. i. tangensis Mayr, 1955 - Boang Island of the Tanga Islands in the Bismarck Archipelago
- R. i. finschii Salvadori, 1882 - Duke of York Islands , New Britain , Watom and Duportail in the south of the Bismarck Archipelago.
- R. i. isura Gould, 1841 - Northern Australia. The distribution area extends from Broome in the north of the Australian state of Western Australia to the northeast of Queensland.
In its entire area of distribution, the barbed fan tail is considered a resident bird. Ringing data also point to this local loyalty: the barbed fan tails, which were ringed in New Guinea and Australia and later found again, had moved less than 10 kilometers from the original location.
habitat
The habitat of the stroke fan tail are dense forests such as rainforests, myrtle heather forests, monsoon rainforests and mangroves. in Australia the razorback also colonizes forests along rivers.
food
The razor fan tail only eats insects. It finds its food in the lower treetop area. It catches a large part of its prey in flight. It can be seen regularly in a waiting area from which it ambushes its prey.
Reproduction
The reproductive biology of the stroke fan tail has so far only been insufficiently investigated. So far, clutches have been found between July and January. The nest is built in bushes and trees. It is a bowl-shaped nest, which, like many fan tails, has a tail-shaped appendage that has an average length of 5.6 centimeters. The nest is therefore often compared to the shape of a wine glass. The nest is built from fine strips of bark and cobwebs. It has an outer diameter of 5.8 centimeters, the inner diameter is 4.6 centimeters.
The clutch consists of one to three eggs. Presumably both parent birds breed, but this has not yet been conclusively investigated. The breeding season and nestling time are not yet known.
literature
- PJ Higgins, JM Peter and SJ Cowling: Handbook of Australian, New Zealand & Antarctic Birds: Volume 7 Boatbill to Starlings, Part A: Boatbill to Larks . Oxford University Press, Melbourne 2006, ISBN 978-0-195-55884-5 .
Web links
Single receipts
- ^ Higgins, Peter & Cowling: Handbook of Australian, New Zealand & Antarctic Birds: Volume 7 Boatbill to Starlings, Part A: Boatbill to Larks . P. 220.
- ↑ a b c Higgins, Peter & Cowling: Handbook of Australian, New Zealand & Antarctic Birds: Volume 7 Boatbill to Starlings, Part A: Boatbill to Larks . P. 222.
- ↑ a b Handbook of the Birds of the World on the Strichelfächerschwanz , accessed on May 19, 2017.
- ^ Higgins, Peter & Cowling: Handbook of Australian, New Zealand & Antarctic Birds: Volume 7 Boatbill to Starlings, Part A: Boatbill to Larks . P. 217.
- ^ Higgins, Peter & Cowling: Handbook of Australian, New Zealand & Antarctic Birds: Volume 7 Boatbill to Starlings, Part A: Boatbill to Larks . P. 219.