"Fifty-ninth Supplement to the American Ornithological Society's Check-list of North American Birds", The Auk 135: 798-813, at p. 809. doi:10.1642/AUK-18-62.1. For a full taxonomic history of this species with copious references, see R. Wright, "Sharpe's Pygmy Finch", Birding New Jersey, June 22, 2018.
doi.org
"Fifty-ninth Supplement to the American Ornithological Society's Check-list of North American Birds", The Auk 135: 798-813, at p. 809. doi:10.1642/AUK-18-62.1. For a full taxonomic history of this species with copious references, see R. Wright, "Sharpe's Pygmy Finch", Birding New Jersey, June 22, 2018.
