the gyrfalcon falco rusticolus

animal autumn background beak beast beautiful biology bird birds blank bright brown coat color cormorant danger ecology environment falco falcon falconry fauna feather feathering field flight fly fowl freedom gerfalcon green ground growth gyrfalcon hawk hawking hunt hunter life light majestic message moss natural nature ornithology outdoor pelage perch peregrine peregrinus plain plumage plume predator prey quill racer raptor rat rusticolus science space speed text unique vertebra vertebrate visitant wader wildlife wings yellow