The area of the head just above the base of the upper mandible[1].

References

  1. ^ Bellrose, Frank C. and The Audubon Society (1983). The Audubon Society Master Guide to Birding. National Geographic Society. ISBN 1426200722. 
Anatomy of an amiotic egg.svg This article is part of Project Glossary, a All Birds project that aims to write comprehensive articles on each term related to animals.


Toothed whale echolocation 01.png This article is part of Project Animal Anatomy, a All Birds project that aims to write comprehensive articles on each term general related to animals.
Little Pied Cormorant.jpg This article is part of Project Anatomy, a All Birds project that aims to write comprehensive articles on each anatomical term related to birds.
Community content is available under CC-BY-SA unless otherwise noted.