Some of Scooter's behaviors seem fairly obvious from context, but others are more mysterious. Is there somewhere a lexicon of bird behaviors and natural vocalizations? Or does the hand-raising process override many of these? Is it very species-dependent? Here are some examples of behaviors and sounds I'd like to understand more.
Making clicking sounds -- is this natural or learned? Sounds a lot like me clicking my tongue, so we click back and forth at each other.
Banging his beak against an object somewhat forcefully.
Running the side of his beak along a perch, the edge of a piece of furniture, my arm, etc.
Doing "bird ups" -- dipping up and down with body bent forward (as opposed to bobbing up and down while upright, which appears to be a happy thing).
Rocking from side to side.
When having head rubbed, tilting head up and opening and closing beak slowly. I assume this means it feels good, but it looks a little like a begging gesture.
Leaning forward with wings very slightly raised, appears to be a "come and get me" solicitation.