Males of some hummingbird species may have evolved to be smaller than their female counterparts because it allows them to put on more impressive courtship displays. Sexual dimorphism – where the sexes ...

This photograph does not show a zunzuncito, but rather a miniature figurine. An image supposedly showing the world's smallest bird, a zunzuncito, was widely circulated on social media in 2019. A ...

The wings of the world's tiniest birds are a near-invisible blur as they whizz around tourists visiting a private Cuban garden that has become a haven for the declining species. The bee hummingbird, ...