Most birds are known for their speed and agility, not their strength. But there are a few species that have both. Here’s the bird that rules the roost when it comes to measuring strength in flight.

Monitoring, research, tourism, photography and environmental education are the tools to protect Brazil’s largest bird of prey, which currently has large and diverse populations only in the Amazon. The ...

MATO GROSSO, BRAZIL — It was supposed to be a shortcut. Now, waist-high in latte brown water, I find myself stumbling over submerged logs, ducking under ant-teeming briars, and pushing through sticky ...