a. (top): Gymnorhina organicum = Gymnorhina tibicen hypoleuca Gould, 1837
b. (center): "Laniarius poliocephalus" = Malaconotus blanchoti blanchoti Stephens, 1826 / Prionops plumatus poliocephalus (Stanley, 1814)
c. (bottom): Sayornis cineracea = Sayornis nigricans angustirostris Berlepsch & Stolzmann, 1896
English: Skulls of Tasmanian White-backed Magpie (top), unidentified corvoid (Grey-headed Bushshrike or White-crested Helmetshrike, center) and White-winged Phoebe (bottom) from left lateral, lower jaw removed. a.n. = anterior nares, a.o.p. = antorbital process, l. = lachrymal bone, pa. = palatine bone, p.o.p. = postorbital process, pt. = pterygoid bone, p.z.s. = zygomatic process of temporal bone.
Date 1907
Source Proceedings of the Zoological Society of London (vol. 1907 issue 2, page 355)
Author W.P.Pycraft (text) - William Plane Pycraft (1868 – 1942)
Source: https://commons.wikimedia.org/wiki/File:PZSL1907Page355.png

The Australian magpie (Cracticus tibicen) is a medium-sized black and white passerine bird native to Australia and southern New Guinea. Described as one of Australia's most accomplished songbirds, the Australian magpie has an array of complex vocalisations.

The grey-headed bushshrike (Malaconotus blanchoti) is a species of bird in the Malaconotidae family. It is widespread throughout Sub-Saharan Africa, although relatively absent in Central and Southern Africa. Its natural habitats are dry savannah and moist savannah.

The black phoebe (Sayornis nigricans) is a passerine bird in the tyrant-flycatcher family. It breeds from southwest Oregon and California south through Central and South America.