Ключевые слова: animal, bird, birds, claws, clue, cold, detect, direction, epidemic, footmark, footpath, footprint, footprints, footstep, footsteps, frost, frozen, hound, hunt, ice, ornithology, outdoor, pattern, paw, pigeon, prey, scan, shelter, small, snow, step, strokes, talon, texture, tiny, toe, trace, tracer, track, tracker, tracks, trail, trunks, walk, way, white, wildlife, winter, wintertime,