Sulphur-billed Nuthatch, the Female and Cape Nuthatch
Caption:
George-Louis Leclerc, Comte of Buffon. "Natural History of birds, fish, insects, and reptiles" coloured and engraved by François-Nicolas Martinet, 1770-1783. 1 - Sulphur-billed Nuthatch. 2 - The female. 3 - Cape Nuthatch