Hear Me Roar: Giant Alligator Says 'Hi'

A 13.5-foot (about 4.1-metre) American alligator has been captured on video at the St Augustine Alligator Farm in Florida, the US.

The giant gator appears to say "hi" to a zoological park curator as it starts bellowing in a seemingly calm way that sounds like a loud roar. 

Alligators commonly bellow at one another to establish territories and attract female alligators. The gator's bellow is loud and throaty and can be heard from up to 165 yards (150 metres) away.