1. An Audubon print of a Great Blue Heron sold in New York by Arader for $250,000 (£190,840).
2. A Green Woodpecker, one of the 323 original watercolour drawings that illustrate the set of Lewin’s Birds of Great Britain sold by Bonhams for £30,000.
3. A Black Swan from the Gould Birds of Australia set which made Aus$360,000 (£211,765) as part of the Mossgreen sale of the Martin Copley library.