I’ve been paying very close attention to their chatter (it’s hard not to lol) and I totally see TFA playing out. They are constantly listening and reacting not only to other members of the flock in the area, but also to crows and others birds’ calls.

It’s super fascinating to watch - they’ll all be napping or eating and will immediately stop what they’re doing on a second’s notice and all turn outward. Sometimes it’ll be from another parrot’s call, sometime from a crow’s, and sometimes I can’t tell what made them react (ha). They’ll also fly away en masse I’m equally short notice - all in sync.

When you start to pay attention, you realize that even in a densely urban place like San Francisco, the city is totally alive with various bird calls and chatter, and the birds are fully attuned to it all.