. Bulletin of the British Ornithologists' Club. Birds. Christoph Hinkelmann et al. 196 \ 111(4) 0 200 500 km COLOMBIA Bogota Thalurania <% colombica W$. Aglaiocercus king]. Figure 2. Geographical and altitudinal distributions of Thaluraniafurcata, T. colombica and Aglaiocercus kingi in Colombia (modified after Hilty & Brown 1986). ranges than there is between A. kingi and T. colombica. Furthermore, the fact that the bill-length of Neolesbia is intermediate between that of A. kingi and T. furcata nigrofasciata, but not between that of A. kingi and T. colombica (being the sam
. Bulletin of the British Ornithologists' Club. Birds. Christoph Hinkelmann et al. 196 \ 111(4) 0 200 500 km COLOMBIA Bogota Thalurania <% colombica W$. Aglaiocercus king]. Figure 2. Geographical and altitudinal distributions of Thaluraniafurcata, T. colombica and Aglaiocercus kingi in Colombia (modified after Hilty & Brown 1986). ranges than there is between A. kingi and T. colombica. Furthermore, the fact that the bill-length of Neolesbia is intermediate between that of A. kingi and T. furcata nigrofasciata, but not between that of A. kingi and T. colombica (being the same as that of T. colombica), suggests that A. kingi and T. furcata are the most likely parent species. Though many characters point to the hybrid origin of Neolesbia nehrkorni, there are others which are difficult to reconcile with the suggestion that Neolesbia is the result of hybridization between Aglaiocercus and Thalurania: blue upper tail-coverts with a trace of violet (these are green in T. furcata and bluish-green in T. colombica and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : The Club
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