Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Location of the bill tip organ in a Senegal parrot P. senegalus. (a) A ventral view and (b) lateral view of a Senegal parrot skull superimposed on a photograph of a live bird to illustrate how the keratin, in which the bill tip organ is embedded, extends the bill into a hook-like structure beyond the maxilla bone. The blue line in both diagrams indicates approximately where the bone ends.
