Recovery of some vulnerable species through restoration efforts has made comebacks more difficult for others in peril.

In a forest near Lake Michigan, two scientists attached a backpack tracking device to a merlin they’d lured into a net. The mission: help prevent the predatory species from gobbling up piping plovers ...

Every year, the fins of as many as 73 million sharks are sliced from the backs of the majestic sea predators, their bleeding ...