From the Rosy Finch proposal, it says, "Brown-capped Rosy-Finches hybridize with Brown-capped Rosy-Finches in the Bitterroot Mountains in Idaho and Montana." Really? From the proposal to change the citation for Dusky Grouse it says, "I recommend that the authority for the following species be changed from “Say, 1823, in Long, Exped. Rocky Mount.” to “Say, 1822, in James, Acct. Exped. Rocky Mount.”: Dendragapus obscurus (Blue Grouse)." Should we give up on Dusky Grouse then?

"Must the same photon strike both the bird and your eyeball?" In that case birds viewed through binoculars would not be countable as the refraction of the lenses eats and emits different photons. Same with spotting scope. In fact the photons reaching the lens of your eyeball are different from what reaches your retina. And then the brain inverts the transmitted image using digital processing.