Each individual animal has its own personality and language which they'll share with you, just like when humans who share a lot of time together tend to form their own language variants.
One of the most helpful books on the subject I've read is "Wild Animals I Have Known" (1898)
If you have doubts about interpretation vs "facts", then I can only guess/assume that you have not had this experience.
The best advice I can give for establishing a relationship is to think hard about what the animal wants most, and try to offer it in a way that it can understand is connected with you.
Matthew Feigal
Plant Engineer, Google Tulip
Published Apr 01, 2019We know they're talking at least enough to have a sense of self, but AFAIK we haven't deciphered the culture/language enough to say anything meaningful to them.
So, listening to sweet birdsong first thing in the morning is like going to a rowdy bar on a Saturday night and listening to the singles yell at each other over the music.
It genuinely never fails to make me chuckle when I'm on the porch listening to birds in the morning.
You missed "DANGER DANGER" and "FEED ME" and "I'M HERE WHERE ARE YOU" and "HEADS UP GUYS (let's mob that raptor)"