Be free! Freedom and necessity concept - necessary to study migration of birds, but it is necessary to catch bird (stress it) and tag it. Ornithologis

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Be free! Freedom and necessity concept - necessary to study migration of birds, but it is necessary to catch bird (stress it) and tag it. Ornithologist releases ringed bird (robin, Erithacus rubecola)

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Size: 4589px × 3059px
Photo credit: © Maximilian Buzun / Alamy / Afripics
License: Royalty Free
Model Released: No

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