The Pintail Duck Anas acuta plate from The British Zoology, Class II Birds, engraved by Peter Mazell fl.1761-97 1766 - (after) Paillou, Peter
The Toucan, The Huppoo and The Cockatoo, from A History of the Earth and Animated Nature, by Oliver Goldsmith, published in London, 1816 - Jacques de Seve
Delhi, engraved by Edward Paxman Brandard 1819-98 c.1860 - (after) Ramage, J
A Bird 1810s - Fedor Petrovich Tolstoy
Owling - Henry Thomas Alken
The Lion cannot face the corwing of the Cock - Friedrich Graetz
The Pet Goose, 1884 - Richard Gibbs Henry Toovey
A Singular Appearance of the Northern Lights above a Laplander's Herd of Reindeer Crossing the Jerdis Javri - (after) Brooke, Sir Arthur de Capell
Great American Hen And Young (Plate Vi) - John James Audubon
Mallard and Teal - Archibald Thorburn
Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the 
