Animals may not have musical instruments, but the way that some species form complex patterns of vocal sequences is remarkable. A recent study has found that Antarctic leopard seal. mating call sequences seem to be similar in predictability to human nursery rhymes.
In some cases, the vocal sequences an animal makes has all the elements of song. A song is made up of repeating sounds that follow a set pattern. These sounds can be combined into notes or syllables, which are then grouped into phrases or motifs.
