SPOILER ALERT: This article contains minor spoilers for “Cuckoo,” now playing in theaters. Roughly 40% of cuckoo bird species are “brood parasites.” Instead of building its own nest, the cuckoo ...

Many cuckoos like to outsource their parenting. These medium-sized birds lay their eggs in the nests of other bird species, tricking the unsuspecting hosts into raising their chicks. In some cuckoo ...

There are plenty of birds that are widely referenced in popular culture today, whether as a sports team name or as the origin for an ubiquitous turn of phrase—looking at you, ugly duckling. But few ...