Little creatures of high birth (7)

I believe the answer is:

eaglets

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

'little creatures' is the definition.
'eaglets' can be an answer for 'creatures' (eaglet is a kind of creature). I am not sure about the 'little' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for eaglets that I've seen before include "Small birds" , "birds early in life" .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app