The jewel-like lakes of the High Sierra in Yosemite National Park are awe-inspiring sights. But for more than a hundred years they've also been biologically disrupted, stocked each year with ...

Lassen Volcanic National Park in far Northern California is a rugged wonderland of lava flows, cinder cones and boiling pools. It is also dotted with welcoming meadows and alpine lakes - places a ...

Frogs leaped into the air and swam for cover as Paul Johnson strolled toward a stream crossing, a Jeep crawling slowly behind him. As the SUV climbed into the Griswold Hills from the San Joaquin ...

You’re probably familiar with the story of how frogs make more frogs. It goes like this: When a lady frog and a dude frog love each other very much, they play a little game of piggyback that results ...

Red-eyed tree frogs, Agalychnis callidryas, lay their eggs on foliage at the edge of ponds; when the tadpoles hatch, they fall into the water. Normally, an egg hatches six to seven days after it is ...