Red-eyed Vireo
Vireo olivaceus
Plain olive-green above and whitish below with no wingbars. Red eye of adults is not always easy to see; immatures have brown eyes. Dark stripe through and above eye. Larger and thicker-billed than warblers. Breeds in mature deciduous forest. Often sings nearly nonstop throughout the day; listen for repetitive musical phrases coming from the treetops. Often with flocks of chickadees and warblers during migration. Winters in South America, where it could be confused with the very similar Chivi Vireo, from which it is best distinguished by voice.
分类信息
- 学名
- Vireo olivaceus
- 命名信息
- (Linnaeus, 1766)
- 目
- Passeriformes
- 科
- Vireonidae
- 属
- Vireo
分布与栖息地
- 繁殖区
- NA : Canada and c, e USA
- 非繁殖区
- to c South America
- 迁徙
- Complete migrants
行为
The breeding habitat of the red-eyed vireo is in the open wooded areas across Canada and the eastern and northwestern United States. These birds migrate to South America, where they spend the winter. The Latin American population occur in virtually any wooded habitat in their range. Most of these are residents, but the populations breeding in the far southern part of this species' range (e.g. most of its range in Argentina, Uruguay, Paraguay and Bolivia) migrate north as far as Central America.<p>In northern Ohio, it seems to return to breed at about the same time as one century ago; but it may leave for winter quarters one or two weeks earlier at present than it did in the past.<p>Red-eyed vireos glean insects from tree foliage, favouring caterpillars and aphids and sometimes hovering while foraging. In some tropical regions, they are commonly seen to attend mixed-species feeding flocks, moving through the forest higher up in the trees than the bulk of such flocks.<p>They also eat berries, especially before migration, and in the winter quarters, where trees bearing popular fruit like tamanqueiro (Alchornea glandulosa) or gumbo-limbo (Bursera simaruba) will even attract them to parks and gardens. Fruit are typically not picked up from a hover, but the birds often quite acrobatically reach for them, even hanging upside down.<p>The nest is a cup in a fork of a tree branch. The red-eyed vireo suffers from nest parasitism by the brown-headed cowbird (Molothrus ater) in the north of its range, and by the shiny cowbird (M. bonariensis) further south. Parasitism by Haemoproteus and trypanosoma might affect these birds not infrequently, as was noted in studies of birds caught in Parque Nacional de La Macarena and near Turbo (Colombia): though only three red-eyed vireos were examined, all were infected with at least one of these parasites.
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Southern Martin
Progne elegans
Large swallow with pointed wings and slightly forked tail. Males are deep iridescent purple; females are also entirely dark, but are brownish below, with faint scaling. Migrates within South America; at some times of year, occurs with other very similar martin species, making identification difficult. Females lack the light belly of similar Purple and Gray-breasted Martins; males essentially indistinguishable from Purple Martin.
Veery
Catharus fuscescens
Warm-colored thrush, with bright reddish-brown tones above, buffy breast, and white belly. Spots are indistinct and washed out, concentrating on upper breast. Beautiful song is cascading spiral of flute-like notes. Found in a variety of wooded habitats, often favoring wetter areas. Winters in South and Central America; very rare in the U.S. after October, unlike Hermit Thrush.
Spot-fronted Swift
Cypseloides cherriei
Little-known swift found mostly in mountainous areas, though flocks occasionally venture into lowlands. All dark with short square tail and angular wings. Namesake white spots on forehead and behind eyes are distinctive, but these can be extremely difficult to see. Many swifts are best left unidentified. Sex and age variation not well known; some birds, maybe juveniles, can show whitish scaling on belly. Occasionally seen singly or mixed with flocks of other swifts, but most often in monotypic flocks of up to several dozen individuals. Voice can be helpful with practice; typically a staccato chatter followed by “pew pew pew” notes like a laser gun.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。