Parrots imitate others just so they know who they're talking to

As humans, we can start a conversation with someone else and be pretty confident they will know we're talking to them. This is one of those things that's so basic we forget to even take it for granted. But this is much, much trickier for parrots — and it might explain their gift for mimicry. » 11/22/12 9:30am 11/22/12 9:30am