"Can Texas Comptroller Glenn Hegar oversee objective scientific research into rare species? Or is he rigging the process to keep them off the endangered list, as his critics charge?"

"Scientists think they have answered a whale of a mystery: How the ocean creatures got so huge so quickly."

"As someone who has studied bobcats for almost four decades, wildlife ecologist John Litvaitis remembers many times returning from the field without spotting a single one of these solitary and shy creatures that often hunt at dusk. But bobcats are less elusive now as their numbers rise and they become more comfortable around humans. Joining the likes of foxes, coyotes and even mountain lions in rare cases, bobcats are making a home in small towns and suburbs — and realizing there is plenty to eat in the cities."

"One of the planet's most unique coral reef systems happens to be nestled in one of the world's most active oil and gas production areas. And for a decade, federal agencies and outside experts have studied how to better protect this fragile marvel, the only national marine sanctuary in the Gulf of Mexico."

"Cicadas overwhelm tree branches across Maryland once every 17 years, like clockwork. But something — some suspect climate change — could be sounding their alarm clocks four years early."

"Timing is everything for migratory songbirds chirping away in North America's trees. If they arrive too late, they'll get only the scraps of spring's insect buffet. Plus, the best nesting spots and mates will be taken, leaving them with lackluster prospects for making baby birds. Arrive too early, and they'll face a hostile winter chill."

"Mexico's government has enlisted the help of three trained dolphins to locate in the wild their less fortunate cousin, the rare vaquita porpoise, in an effort to bring back from the brink of extinction a species with fewer than 40 specimens left."

"U.S. EPA violated the Endangered Species Act when it issued 59 pesticide registrations between 2007 and 2012, a federal court has found."

"A small but dangerous parasite, the winter tick, is spreading north and west as winters become shorter and now is knocking at Alaska's border. The winter tick, which has already devastated moose populations in New England and the upper Midwest, has been confirmed in Canada's Yukon Territory and in the Northwest Territories, where it's infecting elk, mule deer and some moose."

"The Supreme Court on Monday refused to hear a challenge to the U.S. Fish and Wildlife Service’s decision to designate 187,000 square miles of Alaska’s coast and waters a critical habitat for the threatened polar bear."