A boat-billed heron sat patiently on a snag overhanging the river. High on the very top of a tree was a massive nest of sturdy sticks. A pair of incredibly tall (5 feet) and heavy (15 pounds ...

A family of giant river otters was released into the Iberá National Park in northeast Argentina on July 1. The endangered species, with no known breeding populations in Argentina over the past 40 ...

Wondrous drama continues for Helen Blazis and her team on safari to the Pantanal in Brazil ...

Giant river otters have at least 22 distinct calls in their repertoire, including hums, growls, screams, whistles, and barks. They even say “hah!” as a warning or to indicate submission.

Giant river otters are born with the gift of gab—and hums, whistles, growls, and something called a “hah!” too. Adults talk to each other and their pups using at least 22 different calls ...