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The continental European robins that migrate during winter prefer spruce woods in northern Europe, contrasting with its preference for parks and gardens in Great Britain. [ 29 ] In southern Iberia, habitat segregation of resident and migrant robins occurs, with resident robins remaining in the same woodlands where they bred.
[37] [38] 28 raptorial bird species hunt American robins. [39] [40] Adult robins are most vulnerable while breeding activities, whereas feeding flocks are vigilant for predators. [16] The American robin rejects cowbird eggs, so brood parasitism by the brown-headed cowbird is rare, and the parasite's chick does not often survive to fledging. [41]
Robins can use up to 10% of their body weight to keep warm on a single winter night. But when temperatures drop and the ground freezes, finding food becomes very hard for the garden birds without ...
The smallest of the red robins, the red-capped robin is 10.5–12.5 cm (4.1–4.9 in) long with a wingspan of 15–19.5 cm (5.9–7.7 in), and weighs around 7–9 g (0.25–0.31 oz). Males and females are of similar size. It has longer legs than the other robins of the genus Petroica. The male has a distinctive scarlet cap and breast.
Although, like all Australian robins, it is not closely related to either the European robin or the American robin. [14] Gould had called it 'white-bellied robin' in 1848, and other terms used included grey-breasted or white-breasted shrike-robin from the late 19th and early 20th centuries. The 'shrike-' prefix was dropped by the RAOU in 1926. [15]
The flame robin, Petroica phoenicea, 1931 by E. E. Gostelow The largest of the red robins, the flame robin is 12–14 cm (4.7–5.5 in) long. It has a more slender build than other members of the genus Petroica, with relatively long wings and neck and small head. [12]
Black robins live in low-altitude scrub forest remnants. They are entirely insectivorous, feeding on the forest floor or on low branches, and preferring to nest in hollow trees and tree stumps. To shelter from the strong winds and rough seas around the islands, they frequent the lower branches of the forest, or in flat areas with deep litter ...
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