The report focuses on birds that must breed and feed in specific habitats such as forests, grasslands and coastal regions.

In the years following the first report of the so-called Bio-Duck in 1960, scientists struggled to explain it.We still don't have a complete answer, but new work analyzing Bio-Duck sounds suggests ...

In the Antarctic depths, a sound like a giant duck’s quack echoed, baffling humans since the 1960s. Dubbed the Bio-Duck, its origin sparked decades of mystery, hinting at something otherworldly ...

Individual sounds: bicycle bell and bicycle, rowing boat, ducks. Rhyme/song Five (four, three, two, one) little ducks went swimming one day, Over the hill and far away, Mother duck said Quack ...