2 · Nature
25 · earth, world as celestial body
25F · animals
25F3 · birds
25F32 · song-birds
25F32(...) · song-birds (with NAME)
25F32(CROW) · song-birds: crow
25F32(CROW)(+4) · song-birds: crow (+ animal behaviour)
25F32(CROW)(+42) ·
song-birds: crow (+ feeding and care of young)