An analysis of the songs of most of the world's passerine birds reveals that the frequency at which birds sing mostly depends on body size, but is also influenced by sexual selection. The new study ...

The songs blue whales use to communicate and attract mates have been dropping in pitch worldwide for decades, and researchers think it might actually be a sign that an endangered population is ...

In the new work, the researchers studied songs of the great tit (Parus major), a successful urban-dwelling species, in the center of ten major European cities, including London, Prague, Paris, and ...