A decade ago, something strange was happening along the Alaskan coast: Thousands of dead seabirds were washing up on beaches, and no one knew why. What started as a mystery quickly turned into a ...

Many seabirds are starving to death as a marine heat wave lingers off California and fish seek deeper, cooler waters ...

Over the summer of 2015, 40 million mangroves died of thirst. This vast die-off—the world's largest ever recorded—killed off rich mangrove forests along fully 1,000 kilometers of coastline on ...

Low water levels and high temperatures have led to masses of rotting fish clogging the Neekas river, before the salmon could spawn the next generation. Reading time 4 minutes More than 65,000 salmon ...

MISSOULA, Mont. — Multiple states are monitoring a bighorn sheep die off caused by pneumonia. The outbreak was detected mid-December in Hells Canyon. The Idaho Department of Fish and Game, Washington ...

Without sea stars, an explosion of sea urchins knocked the ecosystem off balance. Now scientists are racing to breed a new generation of their predators. An ochre sea star tries to blend into a kelp ...

The Illinois Department of Natural Resources is monitoring a silver carp fish die-off in the Illinois River near Peoria, ...