Chestnut-sided Warbler
Yellow-crowned Warbler ( Dendroica pensylvanica )
The Yellow-crowned Warbler ( Dendroica pensylvanica ) is a small insectivorous bird in the family of warblers ( Parulidae ).
Features
It was named because of the yellow to greenish crown on his head, the color can overflow in the adult males up to orange. The female resembles the male, but the plumage is duller overall. Are located on the white underside feathers on the flanks most extensive rust-colored stripes, which are not as pronounced in the female as in the male. On the gray-black to brownish black elytra are yellow spots. The back plumage is gray-black with white stripes. The thin, pointed beak and legs are black. In the face of the Yellow-crowned Warbler wearing a white plumage with black eye stripe About spillable down to the neck. When the young birds the crown, the neck and the back is green and the gray face. Even with them, the rust-colored side stripes are hardly pronounced.
Nutrition
The diet of the Yellow-crowned - warbler consists mainly of insects, only occasionally fruits are eaten.
Reproduction
The nest was built from parts of plants and hair is built in a small tree or bush close to the ground. In the nest, the female lays plated white eggs, which are hatched in a period 12-13 days three to five with brown spots. The chicks fledge after ten to twelve days. The brown -headed cowbird ( Molothrus ater) defines as a breeding parasite like the lemon Warbler ( Protonotaria citrea ) even when Yellow-crowned Warbler its eggs in the nest.
Occurrence and threat
The breeding areas are located in the east of North America, ranging from southern Canada south to Georgia over New England, the Great Lakes and the Appalachians. In winter, the Yellow-crowned Warbler moved to Central Mexico and Central America. In the south-eastern areas, the stocks have declined. It is assumed that habitat destruction is the major cause. In the northern distribution areas, the stocks are still reasonably stable, or it came to local inventory declines.