The H5N1 virus has infected about 900 people since 2003, and more than half of them died. But so far there is no evidence of human-to-human transmission.

It’s fun to imagine secret dinosaur survivors living today, hidden in a remote corner of Earth. But the truth of who made it through the extinction event 66 million years ago may surprise you.

Central America’s forests are critically important habitat for many forest birds, including endangered species. Narco-traffickers are cutting down trees, leaving birds with nowhere to go.

In this Q&A, experts explain what's going on with avian flu and what health officials are on the lookout for.

Raw milk has always carried the risk of serious illness, and this risk has only risen with bird flu spreading across dairy farms in the US.

An air-filled sac within the birds' lungs is believed to increase the force the birds use to power flight muscles while soaring.

A scientist who wanted to show pigeons don’t need intellect to navigate was surprised by nuances in his own study findings.

New research finds that the syrinx, the vocal organ of birds, and larynx share the same developmental programming.

It may not be obvious to the human ear but birds of the same species sing in different dialects.