PHOENIX -- Citing everything from grazing to insects, the U.S. Fish and Wildlife Service on Monday granted endangered species protection to two cacti found in Arizona. The move comes two years after ...

Saguaro National Park is famous for its namesake giant cactus, but many might be surprised to learn that the park is home to an amazing variety of other cacti — 25 species in all. In addition to ...

PHOENIX (Reuters) - Arizona's saguaro cacti, a symbol of the U.S. West, are leaning, losing arms and in some cases falling over during the state's record streak of extreme heat, a scientist said on ...

WASHINGTON (CN) - The Acuña cactus and the Fickeisen plains cactus have been listed as endangered under the Endangered Species Act, according to the U.S. Fish and Wildlife Service. The critical ...

By analyzing the natural vibrations of a saguaro, scientists can study the cactus's insides without cutting them open.

TUCSON, Ariz.— Following multiple petitions and lawsuits by the Center for Biological Diversity and Defenders of Wildlife, the U.S. Fish and Wildlife Service today proposed to protect cactus ...

Wild burros' appetite for native desert trees are endangering the health of Sonoran ecosystems, a new study found. By damaging cactuses and other vegetation, the burros also put themselves at risk, ...