A very important fact about unusual native animals: just tips for birds (8)

I believe the answer is:

avifauna

I'm a little stuck... Click here to teach me more about this clue!

'for birds' is the definition.
(term for the birds of a particular region)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for avifauna that I've seen before include "The birds of a particular region" , "Flyers locally" , "Local birds" , "Bird collection" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.