The endangered American eel, once abundant along the U.S. East Coast, is critically important in keeping rivers ecologically sound.

Urban environments are harsh, with only fragmentary remains of natural habitat. But human activity has driven a rise of wildlife in cities.

More halibut are dumped dead in the ocean as waste than sold by fishermen.

Blehert interviewed about bats with White Nose Syndrome. White-Nose Syndrome is a fungal disease that's killed over six million bats in the past nine years.