The Center for Biological Diversity has petitioned the U.S. Fish and Wildlife Service to safeguard the Mule Mountains population of the Yarrow’s spiny lizard under the

PHOENIX — A Tucson-based environmental group is petitioning the U.S. Fish and Wildlife Services to put seven amphibians and reptiles on the endangered-species list, including four native to Arizona. Citing declining populations, the Center for Biological ...

In Arizona, spotting a lizard is as common as finding sunscreen in your glovebox. These scaly little sunbathers love soaking up the heat and if you catch one doing push-ups, don’t worry, it’s not prepping for a reptile CrossFit competition. Both male ...

PHOENIX— Federal land managers have allowed years of extensive damage from livestock grazing to streamside habitats vital for endangered plants and animals in Arizona and New Mexico, according to a report published today by the Center for Biological ...

Kay Behrensmeyer, curator of vertebrate paleontology at the Smithsonian’s National Museum of Natural History, is shown in Arizona’s Petrified Forest National Park. Photo by Ben Kligman A fossil from a seagull-sized winged reptile that lived millions of ...