Birding Cerro Colorado, a report by Bill Adsett

I spent 4 days in the Cerro Colorado area from 23 to 26 January with Ramón Pineda Jr as guide. Most notably, we found a young Glow-throated Hummingbird ( Selasphorus ardens ) being fed by its mother, both of which were photographed. I base the identification as Glow-throated mainly on location (4km east of Cerro Flores on the new road to Llano Tugrí, at 1250m) and the white bellies of the birds. According to all books and my own experience, the Scintillant is not found to the east of Cerro Flores, and according to Ridgely, the very closely related female Scintillant Hummingbird ( Selasphorus scintilla ) has a cinnamon belly. My theory after several visits is that the dividing line between the ranges of Scintillant and Glow-throated Hummingbirds is the ridge that separates the San Félix and Tabasará river basins. Cerro Flores forms part of that ridge. The “main” road to Cerro Colorado runs more or less up that ridge, then turns off it slightly to the west at about 1500mt and aft...