Yellow throats
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Yellow throat ( Geothlypis poliocephala ) |
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| Geothlypis poliocephala | ||||||||||||
| SF Baird , 1865 |
The yellow throat ( Geothlypis poliocephala , syn .: Chamaethlypis poliocephala ) is a small songbird from the genus of the yellow throats ( Geothlypis ) in the wood warbler family (Parulidae). Some authors put this species in its own genus Chamaethlypis . The reasons for this are the lack of a distinctive black face mask compared to other yellow throat species, the stronger beak, the longer, staggered tail feathers and the somewhat different song. The IUCN lists them as “not at risk” (least concern).
features
The yellow throat reaches a body length of 14 centimeters and weighs 13.2 to 16.2 grams. The wing length is 5.1 to 6.2 centimeters in the male, 5.1 to 5.8 centimeters in the female. The adult male of the nominate form has black reins , a black eye area and a narrow black stripe on the forehead crown. There is a white eye ring around the eye. The crown plumage and the ear covers are medium gray, the neck and nape plumage olive gray and the upper side plumage olive. The wings are dark brown with olive-colored feather edges. The throat and chest plumage is light yellow, the sides of the chest and flanks olive yellow and the belly area whitish-yellow.
The adult female of the nominate form resembles the male. The crown and neck plumage as well as the ear covers are olive gray, the eye area and reins are dark gray and the eye ring whitish-yellow to white.
Occurrence, nutrition and reproduction
The distribution area is in Central America . The yellow throat lives in moist fields, hedge landscapes, bushy savannas and similar vegetation. It is also found in sugar cane fields in the south of central Mexico. It mainly feeds on insects and other invertebrates , which it finds mainly in the lower areas of the vegetation . Occasionally, like the flycatcher , it lurks for insects flying by. It creates its deep, bowl-shaped nest well hidden in the dense vegetation or in a trough of grass. The nest is built from grass and padded with fine plant fibers and animal hair. The clutch consists of two to four eggs (the southern subspecies usually lay two). There are no studies on the incubation and nestling time.
Subspecies and distribution
There are seven recognized subspecies:
- Geothlypis p. poliocephala S. F. Baird , 1865 - Mexico (from Sinaloa to Oaxaca )
- Geothlypis p. caninucha Ridgway , 1872 - From Oaxaca (Mexico) to Honduras
- Geothlypis p. palpebralis Ridgway, 1887 - From Veracruz (Mexico) to Costa Rica
- Geothlypis p. icterotis Ridgway, 1889 - From Nicaragua to Costa Rica
- Geothlypis p. ridgwayi ( Griscom , 1930) - From Costa Rica to Panama
- Geothlypis p. ralphi Ridgway, 1894 - Tamaulipas and San Luis Potosí in Mexico; formerly also to the extreme limits of southeast Texas
- Geothlypis p. pontilis ( Brodkorb , 1943)
swell
literature
- Jon Curson, David Quinn, David Beadle: New World Warblers. Helm, London 1994, ISBN 0-7136-3932-6 , pp. 64 and 183-184.
Web links
- Geothlypis poliocephala in the endangered Red List species the IUCN 2008. Posted by: BirdLife International, 2008. Accessed January 4 of 2009.
- Yellow throats at ITIS