Black-capped Gnatcatcher
Polioptila nigriceps
Gnatcatchers (Polioptilidae) · Passeriformes (Passeriformes)
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Revisione necessaria
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Spesso confuso con
Nei quiz i giocatori confondono più spesso Black-capped Gnatcatcher con questi uccelli: o questa specie è stata scelta per errore, o il contrario.
| Specie | Confusioni |
|---|---|
| Black-tailed Gnatcatcher Polioptila melanura | 3 |
| Piovanello maggiore Calidris canutus | 1 |
| California Gnatcatcher Polioptila californica | 1 |
Famiglia
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.
Ordine
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 …