The yellow-breasted chat is found throughout North America. It breeds from the southern plains of Canada to central Mexico, and mainly migrates to Mexico and Central America for the winter, although some may overwinter in coastal areas farther north. This species occurs in areas where dense shrubbery is common. Today, its habitat often consists of abandoned farmland and other rural areas where overgrown vegetation proliferates.
Description
If they are considered part of the family Parulidae, yellow-breasted chats are the largest species of parulid. In fact, they can often weigh more than twice as much as other parulid species. However, their membership in this taxonomic family is disputed. This species reaches a total length of and a wingspan of. Body mass can range from. Among standard measurements, the wing chord is, the elongated tail is, the relatively long, heavy bill is, and the tarsus is. These birds have olive upper parts with white bellies and bright yellow throats and breasts. Other signature features of yellow-breasted chats are their large, white eye rings and blackish legs. If seen, this species is unlikely to be mistaken for any other bird.
Biology
The yellow-breasted chat is a shy, skulking species of bird, often being heard but not seen. The breeding habitats of this species are dense, brushy areas and hedgerows. The nests of these birds are bulky cups made of grasses, leaves, strips of bark, and stems of weeds and lined with finer grasses, wiry plant stems, pine needles, and sometimes roots and hair. Nests are invariably placed in thick shrubs and often only about above the ground. They lay from three to five, creamy-white eggs with reddish-brown blotches or speckles, incubated by the female, which hatch in 11 to 12 days. Both parents tend the young, which fledge in roughly 8 to 11 days. Chats are apparently vigilant guards of their nests, as parasitism by brown-headed cowbirds is not as frequent as with other cup-nest builders. However, they are not as monogamous as other warblers. In one study in central Kentucky, DNA fingerprintingrevealed that 17% of 29 yellow-breasted chat nestlings were not sired by the male of the social pair and 33% of 9 broods contained at least one extra-pair nestling. Yellow-breasted chats are omnivorous birds, and forage in dense vegetation. Mostly, this species feeds on insects and berries, including blackberries and wild grapes. Insects up to moderate sizes, including grasshoppers, bugs, beetles, weevils, bees, wasps, tent caterpillars, ants, moths and mayflies, are typically preyed upon and are gleaned from dense vegetation. Other invertebrates, including spiders, are occasionally eaten, as well. Uniquely for a passerine of its size, the chat occasionally grips food with its feet before it eats. The song of this bird is an odd, variable mixture of cackles, clucks, whistles and hoots. Their calls are harshchak's. Unlike most warblers, this species has been known to mimic the calls of other birds. Thus, less experienced field birdwatchers sometimes overlook chats after mistaking their song for species such as grey catbirds and brown thrashers, which share similar habitat preferences and skulking habits, though are generally much more abundant. During the breeding season, chats are at their most conspicuous as they will usually sing from exposed locations and even fly in the open while gurgling their songs.
Status
Yellow-breasted chats are declining in eastern North America due to habitat loss and degradation due to deforestation and urban development. This species, though less vulnerable than other cup-nesters, is still sometimes victim to brood parasitism from brown-headed cowbirds that have taken advantage of the fragmentation of eastern forests to expand their range during the last century. However, the species still occurs over a wide range and is considered to be of least concern globally.
