. Coloured illustrations of British birds, and their eggs . fter they leave thenest, than at any other period. In these early states ofplumage it forms the Falco aeruginosus of Linneus, and arun-dinaceous of Bechstein. When more advanced in age, about their second summer,these birds begin to acquire some of the variegated coloursof maturity : the dark ground colour of the plumage becomesmore rufous on the thighs and flanks ; the tail paler ; andon the ruff, shoulders, and front of the neck, some yellowishwhite spots appear, and a gloss of ashy grey becomes visibleupon some of the larger covert
. Coloured illustrations of British birds, and their eggs . fter they leave thenest, than at any other period. In these early states ofplumage it forms the Falco aeruginosus of Linneus, and arun-dinaceous of Bechstein. When more advanced in age, about their second summer,these birds begin to acquire some of the variegated coloursof maturity : the dark ground colour of the plumage becomesmore rufous on the thighs and flanks ; the tail paler ; andon the ruff, shoulders, and front of the neck, some yellowishwhite spots appear, and a gloss of ashy grey becomes visibleupon some of the larger coverts of the wings. In the third and fourth year these approaches to maturitybecome more and more apparent, and, when the full plumageis attained, at the age of four years, the bird presents thetints and distribution of colours represented in the this time, the back is rufous brown, the tail pale grey,without any bars, and the under surface of this and of thequill-feathers plain silvery-white. No. 18 is the egg of the Marsh Harrier. ..jm --*-. a* /6\. V-
Size: 1698px × 1472px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubjectbirds, bookyear1842
