English: A pair of plates
Black Swan Cygnus atratus
Emu Dromaius novaehollandiae
Date before Cayley's death in 1950
Source What Bird Is That? by Neville W. Cayley (1984), page 13. First published 1931.
Author Neville William Cayley (scanned by Toby Hudson)
Source: https://commons.wikimedia.org/wiki/File:Cayley_p13_Black_Swan_and_Emu.jpg

The black swan (Cygnus atratus) is a large waterbird, a species of swan, which breeds mainly in the southeast and southwest regions of Australia. Black swans are large birds with mostly black plumage and red bills. The black swan is common in the wetlands of southwestern and eastern Australia and adjacent coastal islands.

The common emu or great emu or simply emu (Dromaius novaehollandiae) is the second-largest living bird by height, after its ratite relative, the ostrich. It is endemic to Australia where it is the largest native bird and the only extant member of the genus Dromaius. The emu's range covers most of mainland Australia, but the Tasmanian emu and King Island emu subspecies became extinct after the European settlement of Australia in 1788.