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Eurasian Eagle-Owl

Bubo bubo (Linnaeus, 1758)

Пугач | Обыкновенный филин

2014-05-29
Zalishiki
© Oleksandr Vikirchak

Description

Background color of adult Eagle Owls is very variable from dark-rusty dense black-brown mottled to pale-buff or almost creamy-white with rare isolated spots. Head is dark streaked above. Feathers of shoulders are with dark tips and marble same-color pattern on base of feathers; its outer webs often are with large white spots which formed character mottling on the back of Eagle-Owl. Wing is broad and short, its tip is formed by 3-5 primaries with dark tips. Borders of outer webs of 1-3 primaries are barbed, second and third primaries are barbed only in narrowed terminal part. Tail is slightly rounded; tail feathers are with very variable cross-pattern. Facial disc is expressed only in bottom part. Breast is black and brown longitudinal streaked. Flacks and belly have character cross-pattern which is different in each geographical races. Tarsus and toes are full feathered. Eyes are orange-red, bill and claws are black. Females are larger than males. Young birds have variable background color - from orange-buff to pale-buff, with narrow cross-strips; throat is white; above the eyes there are two dark patches. Tail and flight feathers are colored as on adults, and not changed in first autumn moulting.

References

"Птицы Казахстана" том 2. "Наука". Алма-Ата, 1962.

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