A river otter the moment it was released into the Rio Grande – Credit J.N. Stuart, CC 2.0. Ecologists say they help riverine ...

River otters may live 20 years in captivity; few survive more than 10 years in the wild. The river otter has few natural predators because of its strength, sharp teeth, aggressiveness when attacked, ...

River otters are a top predator in the area, so their poop is full of DNA from worms, fish, and other organisms, including ...

They're also generally very shy. River otters are top-level predators with broad diets that include fish (shown), as well as crustaceans and birds. Credit: Matthew Fryer As I’ve come to discover ...

As the National Environmental Education Foundation observed, the predators help to maintain natural balance by keeping prey ...

The otter - as "top predator of our freshwaters" - was "an ... said otter numbers are an important indicator of river health Graham Scholey, conservation specialist at England's Environment ...

Otters also help to improve water quality, which is beneficial for river health and the human water supply. "They provide that ecosystem service of being a top predator," Forman added.

American river otters are a keystone species in aquatic ecosystems, the trust said. Their presence indicates a healthy ecosystem. “As a predator, they regulate prey populations, their foraging ...

Sightings of otters in a Welsh river are on the rise following the launch of a programme to boost local wildlife. As many as five of the animals have been spotted in the River Cynon, after ...