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The yellow-breasted boatbill is a distinctive bird that is small in size and stature ranging from 11 cm to 12.5 cm. On average they weigh around 9-10g. [5] Its black bill is large relative to its body and is wide, long and flat resembling the shape of a boat, hence the bird’s name.
Measuring about 27 cm (11 in) in length, the yellow-faced parrot has a stocky body and short tail. [6] It is a predominantly green and yellow-plumaged bird that in adults has a yellow crown, lores, cheeks and auriculars. The rest of the head, upperparts and chest are green with some yellowish-green scalloping.
These birds have olive upper parts with white bellies and bright-yellow throats and breasts. Other signature features of yellow-breasted chats are their large, white eye rings, and blackish legs. When seen, this species is unlikely to be mistaken for any other bird. The song is an odd, variable mixture of cackles, clucks, whistles, and hoots.
The yellow chat is a small passerine bird usually seen in groups of 2-10 individuals. [12] They are approximately 11 cm (4.3 in) tall and weigh 9 g (0.32 oz). [2] They are sexually dimorphic with the adult male having a bright golden-yellow forehead and underparts with a prominent black crescent breast band. [13]
The chin, throat and, in some cases, upper breast tend to appear as a washed yellow with yellow spots on the side of the breast. [2] [8] The term ‘citreogularis’ is frequently used to describe young birds which have a yellow fore-neck. [6] The tail feathers also tend to appear with a shallower cut, unlike those of adult little friarbirds. [6]
Adults have greenish upperparts and yellowish underparts (especially on the throat), with a dusky wash on the chest. They have a white or yellow eye ring that lacks the teardrop projection of Pacific-slope (E. difficilis) or cordilleran (E. occidentalis) flycatchers, white or yellowish wing bars that contrast strongly against the black wings, a broad, flat bill, and a relatively short tail ...
The yellow-breasted greenfinch is 12–14 cm (4.7–5.5 in) in length and weighs between 15 and 21 g (0.53 and 0.74 oz). It has a brown conical bill and bright yellow wing bars. The underparts are bright yellow. The sexes have similar plumage but the female is less brightly coloured. [8]
The underparts are white with yellow breast sides and flanks. Young birds are duller with brown eyes, a brown tint to the back, and less yellow on the underparts. The adult yellow-green vireo differs from the red-eyed vireo in its much yellower underparts, lack of a black border to the duller gray crown, yellower upperparts and different eye color.