Bird bill
Crusty lesions, ulcers, discoloration, or abnormal growth of a beak can be signs 
of a... [DOC] [TLE] How Birds Keep Their Cool | Audubon [PAR] Aug 1, 2012 ... We can protect birds and the places they call homeas long as people ... out that 
the size of a bird's bill isn't the only factor that keeps it cool.