Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
White-headed woodpecker measurements:
Tongue beyond tip of bill 34.5 mm. (average
of two measurements). The hyoid apparatus
was found to terminate at the base
of the bill, with no indication of any
extension into the orbit.