An Arizona chapter of the influential Sierra Club — founded in 1892 by legendary conservationist John Muir and now the nation’s largest environmental group — has come out in opposition to a controversial bighorn sheep reintroduction near Tucson.
More than 764,000 acres of Southeast Arizona and Southwestern New Mexico became federally designated prime habitat for the endangered jaguar today.
Vertebrates would have to evolve 10,000 times faster than they ever have to keep up with the pace of change predicted for their climatic niches in the next century, says a University of Arizona researcher.
The black-tailed prairie dogs, a keystone species, should improve grassland health and animal diversity in their new Sonoita-area home.
A colony of black-tailed prairie dogs moved into new digs Monday as part of an Arizona Game and Fish Department program to re-establish the once-native species to its historic range.
Bears lost so much vital habitat to forest fires in the Huachuca Mountains that some of them now forage for food in nearby Sierra Vista — prompting a hunt to thin their numbers and protect people.