Yes eBird is a fantastic resource sponsored by Cornell Lab of Ornithology. And it is worldwide, covers all 10,000 or so currently recognised species. If you go here,
https://ebird.org/home
and click on explore, and enter chaffinch, you'll see that there are in fact 2 species of "chaffinch", common and blue. I know little about Blue Chaffinch [Cornell does], but of course the bird ordinarily known in the UK as Chaffinch is more properly Common Chaffinch, to distinguish it from its congener.
Just for fun, enter "robin" and you will see many entries. The robin known in England is more properly European Robin, the common robin in N America is [reasonably enough] American Robin. They're not even that closely related.
Here endeth today's biogeography lesson!