blue-gray gnatcatcher
Polioptila caerulea
Gnatcatchers (Polioptilidae) · Passeriformes (Passeriformes)
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Revisão necessária
O Birdr é um projeto da comunidade, e muitas fotos ainda precisam de um olhar humano. Se você conhece esta ave, pode ajudar revisando as imagens.
Muitas vezes confundido com
Nos quizzes, os jogadores mais confundem blue-gray gnatcatcher com estas aves—ou esta espécie foi escolhida por engano, ou o contrário.
| Espécies | Confusões |
|---|---|
| black-tailed gnatcatcher Polioptila melanura | 7 |
| negrelho Aythya marila | 1 |
| greater sage-grouse Centrocercus urophasianus | 1 |
| painho-da-ilha-da-madeira Hydrobates castro | 1 |
| peitica Empidonomus varius | 1 |
Família
The gnatcatchers are a family of small passerine birds in the family Polioptilidae. The 20 species occur in North and South America (except for the far south and the high Andean regions). Most species of this mainly tropical and subtropical group are resident, but the blue-grey gnatcatcher of the United States and southern Canada migrates south in winter.
Ordem
A passerine () is any bird of the order Passeriformes (; from Latin passer 'sparrow' and formis '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their toes (three pointing forward and one back), which facilitates perching. With more than 140 families and some 6,500 identified species, Passeriformes is the largest order of birds and one of the most diverse clades of terrestrial vertebrates, representing 60% of …