robin, erithacus rubecula, caught face up in a net for scientific study with blue sky in the background.

animal autumn background backgroundn beak bird birds blue caught cloud clouds color erithacus europe face fauna feathers field forest insectivore insectivorous invisible japanese migratory mountain mountains muscicapidae nature net orange orchard ornithology outdoors plumage pluna protection robin rubecula science scientific sky study trapped wildlife wing wings