Ask A Scientist© Zoology Archive

name      donna
status    student
age       17

Question - what is the large mass or growth, on the eagles beak....

If you are referring to the area by the nostrils that seems to raise above
the upper mandible, I believe the structure is called an operculum. I know
that is the term with pigeons, and I believe it is true with all birds
having this raise on the upper mandible. I could be in error.
Steve Sample
York High School
Elmhurst, Illinois
60126
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