Area of Focus: Physiology & Nutrition

Mule deer had high stress hormone levels amid B.C. wildfires

Newly described behavior expands our knowledge of these northern Minnesota packs

Broader diets are making for bigger males

But their survival may still be at risk

Northern elephant seals get just two hours of sleep at sea, taking deep dives below predators

Recent findings upend the previous understanding of how songbirds make such long journeys

After rapid glacier melt, mammals that disperse farther are quicker to move into newly vegetated areas

Mule deer and pronghorn are succumbing to starvation in parts of Wyoming and Utah

Carcasses of birds that collided with windows offer scientists a view into their interior world

Managers fed manatees nearly 400,000 pounds of lettuce to protect them from starvation