2 · Nature
25 · earth, world as celestial body
25F · animals
25F3 · birds
25F39 · other birds
25F39(...) · other birds (with NAME)
25F39(...)(+4) · other birds (with NAME) (+ animal behaviour)
25F39(WOODPIGEON)(+43) ·
other birds (WOODPIGEON) (+ animals courting and mating)