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In addition, the front edge of the wing is covered with a group of feathers called the marginal coverts. Within each group of wing coverts, the rows of feathers overlap each other like roof tiles (the greater coverts are overlain by the median coverts, which in turn are overlain by the outermost row of lesser coverts, and so on).
Also, the collective name for the undertail coverts. [125] The crissal thrasher derives its name from the term, having distinctive colouring in the region, in contrast with the balance of its plumage. Other birds having distinctive crissum colouration include Le Conte's thrashers and grey catbirds. [126] crop
External anatomy of a typical bird: 1 Beak, 2 Head, 3 Iris, 4 Pupil, 5 Mantle, 6 Lesser coverts, 7 Scapulars, 8 Coverts, 9 Tertials, 10 Rump, 11 Primaries, 12 Vent, 13 Thigh, 14 Tibio-tarsal articulation, 15 Tarsus, 16 Feet, 17 Tibia, 18 Belly, 19 Flanks, 20 Breast, 21 Throat, 22 Wattle, 23 Eyestripe Topography of a typical passerine.
Bird feeders often attract pine siskins, where they may eat fragments of heavy-shelled seeds, such as black oil sunflowers, left behind by heavier-billed bird species. In summer, they will eat many insects, especially aphids, as well as a few spiders and grubs, which they then feed to the young as a protein-rich food that contributes to their ...
Xantus's hummingbird Conservation status Least Concern (IUCN 3.1) CITES Appendix II (CITES) Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Aves Clade: Strisores Order: Apodiformes Family: Trochilidae Genus: Basilinna Species: B. xantusii Binomial name Basilinna xantusii (Lawrence, 1860) Range of Xantus's hummingbird Synonyms Hylocharis xantusii Xantus's ...
The lesser wing-coverts are bluish-grey and there is a wash of this colour on the rump. The lower breast, belly and vent are deep rufous-chestnut with black markings on the flanks. The undertail coverts are black. The bill is black and the feet and tarsi are grey. Adult Female: Similar to the male, but the rump shows more bluish-grey colour.