Finding information on older ornithologists edit
Finding old synonyms for birds edit
see:
- John Gould (1837) - The Birds of Great Britain BHL
- John Gould (1873) - The Birds of Europe BHL
- Bonhote (1907) - Birds of Britain IA
see e.g. w:en:Common house martin, w:en:Picus (genus), w:en:European green woodpecker, etc.