Parrot parents "name" their children with a signature call.
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A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Cats recognise the voice of their owner, but never evolved to care.
22
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2