Whales sing complex repeated songs that can travel across entire ocean basins.

The longer version

Low-frequency sound is the only signal that works over oceanic distances, because it is absorbed far less than higher pitches and can be channelled by layers of water at different temperatures. Baleen whales exploit exactly that window.

A song is organised rather than random: phrases repeat in fixed sequences, and males within a population sing broadly similar versions that change gradually over years. Because the sound persists in the water long after it is produced, individuals may be responding to a shared acoustic environment rather than addressing one another directly. Shipping noise adds competing low-frequency sound that can shorten the effective range of these calls.

Where this entry sits

This collection gathers small surprises about mammals, reptiles, amphibians, birds, fish, insects, and the pets living alongside people. Expect odd details about senses, anatomy, and everyday behaviour that many people never notice in the animals around them. The full list sits on the Animals page, where every entry is listed in order.