Pair of male and female penguins in focus with another two playing in the background.
Author: Walter Butler
Title: A History of the Birds of New Zealand.
Chromolithograph of a group of emus.
Author: Alfred Edmund Brehm
Title: Brehms Tierleben
A pair of foxes in the snow.
A pair of male and female coots resting in reeds.
Title: Naturgeschichte der Vögel Mitteleuropas (Natural History of the Birds of Central Europe)