Olive-crowned Yellowthroat
Olivscheitel Yellowthroat ( Geothlypis semiflava )
The Olivscheitel Yellowthroat ( Geothlypis semiflava ) is a small passerine bird in the genus Yellowthroat ( Geothlypis ) in the family of warblers ( Parulidae ). It is found in Central America and South America. Genetically very similar to the Kentucky Warbler ( Oporornis formosus ). The IUCN lists them as " not at risk " (least concern).
Features
Olivscheitel Yellowthroat reach a body length of 13.5 centimeters and weigh around 17 grams. The wing length is 5.6 to 6.1 inches in the male, the female, 5.5 to 6.2 centimeters. Adult male of the nominate Olivscheitel Yellowthroat have a striking black face mask that extends to the sides of the neck and the ears ceilings. In contrast to other Gelbkehlchenarten them, however, the front crown band is missing. The rest of the head plumage is bright olive green. The wings are dull brown with olive feather edges. The top is also light olive green plumage; the underside plumage bright yellow, olive with faded edges and sides of the chest. Her legs are flesh-colored; the bill blackish. Adult females of the nominate wearing an olive head and top plumage and a bright yellow underside plumage and a short olivgelben Superciliarstreifen and a little pronounced olivgelben eye ring.
Male fledglings in the first year are distinguished by the less pronounced facial mask, which is limited only to the sides of the head. Females in the first year wearing a darker plumage and a clear brighter underside plumage. Juvenile have a brown head olives and top plumage and a bright, yellow to buff underside plumage.
The appearance of the subspecies Geothlypis see bairdi deviates only slightly from the nominate form from. The beak is somewhat longer; the tail feathers are slightly shorter.
Resources, nutrition and reproduction
The distribution area extends from Central America to South America. Olivscheitel Yellowthroat inhabit dense bushes on forest edges, clearings and bushy wet landscapes were found on roadsides, often in the vicinity of water. They feed mainly on insects and other invertebrates. Hatched from April to June. Her deep, cup-shaped nest they lay well hidden in a grassy hollow or in the dense undergrowth. A nest usually consists of two eggs. About the Bebrütungs and nestling period, there are no studies.
Subspecies and distribution
There are two recognized subspecies:
- Geothlypis see semiflava Sclater, 1860 - West Columbia to southwestern Ecuador
- Geothlypis see bairdi Ridgway, 1884 - From the east Honduras Nicaragua, Costa Rica, Panama to northwestern