Keywords: CráneoAve.svg Bird skull BirdSkull png 2009-02-16 22 59 UTC William Beebe pd-old declared pd on http //www archive org/details/birditsformfunct00beeb PD-old Vectorized image More complete Mario modesto BirdSkull png original upload log This image is a derivative work of the following images File BirdSkull png licensed with PD-old 2007-09-02T06 55 48Z Shyamal 697x438 49202 Bytes <nowiki> Bird skull The bird its form and function 1906 C William Beebe pd-old declared pd on http //www archive org/details/birditsformfunct00beeb </nowiki> Uploaded with derivativeFX Chicken skulls SVG bird anatomy William Beebe |