"From chainsaws to flute solos, the lyrebird can mimic almost any sound it hears. But eavesdrop on this magical bird, and what it is singing can sometimes be troubling."

"Some of Britain's most cherished spring visitors are disappearing in their thousands. Ornithologists say species such as the cuckoo, nightingale and turtle dove are undergoing catastrophic drops in numbers, although experts are puzzled about the exact reasons for these declines."

"In February, the Obama administration declared the Pacific walrus to be at risk of extinction because its Arctic habitat was melting. But it declined to list the marine mammal as an endangered species, saying a backlog of other animals faced greater peril."

Photographer Bryant Austin's eye -- and imagination -- were so captured by snorkeling close to humpback whales that he set himself to creating life-sized portraits of the creatures.

"Congress [April 14] approved a budget bill that includes a rider removing wolves in Montana, Idaho, Washington, Oregon and Utah from the federal endangered species list and sets the stage for near-term delisting in Wyoming. The measure returns control of wolf management to the states."

"Over the years, rat poison has spared [California] residents untold filth and disease. But a new generation of highly toxic, long-lasting poisons is killing not only rats, mice and ground squirrels, but whatever feeds on them, too."

"Montana Fish, Wildlife and Parks is introducing a plan today that would allow bison in Yellowstone National Park to travel north outside the park boundaries into Montana's Gardiner Basin during winter months."

"Canada's annual seal hunt opened Monday off northeastern Newfoundland in an area called The Front, but few sealers went to the ice amid low demand for seal pelts, poor prices and a European Union ban on seal products."

"A fatal bat disease has been confirmed in Kentucky for the first time, state and federal officials said Wednesday."