If – by some huge stretch of the imagination – I were ever to find myself in the position of being able to rename key avian species, I think I would start with the finches common to the UK. To my eye, the Greenfinch is more golden than the Goldfinch, whose own distinct head colouring would surely lend itself to being re-branded the Redfinch. That would leave the Chaffinch, whose powder blue head would warrant the name of the Bluefinch. That would leave the Bullfinch and I guess that name should stick – few birds look quite the bruiser more than that one.
Canon 1DS MkII, 1/500 sec, f8, 326mm at ISO 200