When the total solar eclipse happens on Monday, animals at homes, farms and zoos may act strangely. Researchers can’t wait to see what happens when day quickly turns to night. By Juliet Macur and ...

Talk about a jungle joyride -- two gorillas went completely bananas for each other, tossing modesty into the bushes, and getting busy in broad daylight ... giving stunned onlookers a surprise mating ...

Plants and animals have evolved all sorts of ways to make themselves more appealing to potential mates—including colorful ...

The National Zoo generally is a family-friendly place, but at the Woo at the Zoo event Friday night, it was all about wild animal sexual behavior. “We like to say we’re a free zoo where animals can ...

The three mating strategies of male western side-blotched lizards are predictable based on the color of their throats: orange, yellow, or blue. Each color is correlated with size, testosterone level, ...

While the rest of Washington seemingly was focused on the upcoming presidential inauguration, the capital's famous giant pandas were apparently attempting a transition of their own. The National Zoo ...

While millions of people are preparing to watch the total solar eclipse that will make its way across North America on Monday, the animals in that affected area — in homes, on farms, in zoos and in ...