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The underlying molecular and genetic mechanisms that are responsible for crest feather formation in domesticated bird species are not well understood. As such, crest feathers are widely studied in morphological research and other related biological disciplines, particularly concerning domesticated species. [5]
The female is a brown bird with short crest, blue facial skin and spotted black-and-white below. [ 2 ] There are two subspecies ; the subspecies from Borneo and Bangka Island , L. i. ignita (lesser Bornean crested fireback) and L. i. nobilis (greater Bornean crested fireback), have brown central tail feathers, whitish legs and are rufous below ...
The Madeira firecrest is a small plump bird, of 9–10 cm (3.5–3.9 in) length and weighing about 5 g (0.18 oz). It has bright olive-green upperparts with a bronze-coloured patch on each shoulder, and whitish underparts washed with brownish grey on the breast and flanks.
Adult crested bobwhite are about 178 to 216 millimetres (7.0 to 8.5 in) long. The sexes are very similar in appearance. The long feathers on the fore-head and crown are pale buff or white, and the crest feathers may be dark. The back and sides of the neck are marbled in black and white and the throat is white or buff, sometimes spotted with black.
Crested auklets are known for their forehead crests, which is made of black forward-curving feathers. These forehead crests are highly variable, and can have between two and twenty three narrow forward curving feathers. The average auklet has 12 crest feathers, which are of variable length, between 8.1 and 58.5 millimetres. [10]
Song of the male goldcrest, near Camberley Male in France displaying orange crest feathers that are set within a narrow rim of yellow feathers. The typical contact call of the goldcrest is a thin, high-pitched zee given at intervals of 1–4 seconds, with all the notes at the same pitch. It sometimes has a more clipped ending, or is delivered ...
The common firecrest is a small plump bird, 9 cm (3.5 in) in length with a wingspan of 13–16 cm (5.1–6.3 in), [2] and weighs 4–7 grams (0.14–0.25 oz). It has bright olive-green upperparts with a bronze-coloured patch on each shoulder, and whitish underparts washed with brownish-grey on the breast and flanks.
The long-crested eagle (Lophaetus occipitalis) is an African bird of prey characterised by its shaggy crest of feathers. In the family Accipitridae which includes all the eagles, it is currently placed in a monotypic genus Lophaetus. It is found throughout mid- and southern Africa, with differing home ranges due to food availability and ...