Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
K.Selander,
1953
Calvitta formosa
19
Tonala', 180ft., Chis., México
Nov. 2 A flock of 6 birds in trees + hedgerow just SW of town. We got right under the tree before the birds flew and I got a good earfull of the "caw" call. It is delivered with an almost explosive accent. Also a whistle note was given by one of the birds.