The Yao people of Mozambique vocally signal honeyguide birds to show them the location of hives, which the people harvest and share with the birds. -- Read more on ScientificAmerican.com
Inbred canaries sang songs with less pure tones, and at slightly different pitches, than their outbred cousins—and female canaries seemed to be able to tell the difference. -- Read more on ScientificAmerican.com