N. J. Collar, G. M. Kirwan
Bulletin of the British Ornithologists’ Club 138 (3), 265-271, (24 September 2018) https://doi.org/10.25226/bboc.v138i3.2018.a7
Long-tailed Woodnymph Thalurania watertonii is known with certainty from Pernambuco, Alagoas and Sergipe, north-east Brazil, but the type specimen is still listed, albeit with reservations, as having been taken 3,000 km to the west in Guyana. The collector, Charles Waterton, gave the specimen to George Loddiges in 1844, claiming he took it 20 years earlier on the Mibiri Creek, south of what is now Georgetown. However Waterton, who had a particular interest in hummingbirds, also collected 58 birds in forest near Recife, Pernambuco, in 1816. Given these facts, the total absence of other records of the species from Guyana and its replacement there by Fork-tailed Woodnymph T. furcata, it seems far more likely that Waterton simply misremembered where he collected his specimen of T. watertonii and that the type locality is, as O. M. O. Pinto judged, Pernambuco (more specifically coastal Pernambuco).