Monogamy Helps Geese Reduce Stress

With monogamy so uncommon in the animal world, the idea of lifetime fidelity can seem a little strange, at least to evolutionary biologists.

But in greylag geese, which can live for 20 years and share those years with just one mate, biologists have found a benefit: stress reduction. During fights, males with mates have lower heart rates than their single brethren. If their partners are nearby, they’re even more relaxed.

Lees meer: Wired Science