Since the 1960s, a strange, repetitious quacking noise called a “bio-duck,” which can frequently be heard in the Southern ...
In 1982, a mysterious sound was recorded in the Pacific Ocean, baffling researchers and possibly hinting at sophisticated ...
The new species of frog makes a sound similar to a duck's quack, researchers said A ... It had a unique call pattern consisting of two to three notes, similar to the quack of a wild duck, an ...