process of bird banding, small bird ringing at ornithological station, curonian spit, kaliningrad oblast, russia. ornithologist

animal aviculturist banded banding beak bill biometrics bird birdbanding birdwatching captured claw closeup control counting eagle ecology feathers inspecting laboratory leg male marking method migrate migration natural nature of ornithological ornithologist ornithology plumage predator protection rescue research ring ringed ringing rings scientific scratch species wild wildlife zoology