. Bulletin of the British Ornithologists' Club. Birds. 5. N. G. Howell 181 Bull. 1993 113(3). 18°N- A. v. viridifrons A. v. rowleyi A. v. viridifrons x rowleyi? A. v? wagneri 16°N 97°W 95°W Figure 1. Distribution of Green-fronted Hummingbirds in the state of Oaxaca. Dotted line indicates the range of wagneri, dashed line indicates the ranges of nominate viridifrons and rowleyi. l=Putla de Guerrero, 2 = km 136. SWR: sympatry of rowleyi and wagneri (vicinity of Tototalpan SE to Nejapa and El Camaron). SWV: sympatry of nominate viridifrons and wagneri (12 miles NE of Juchitan). cinnamon ti
. Bulletin of the British Ornithologists' Club. Birds. 5. N. G. Howell 181 Bull. 1993 113(3). 18°N- A. v. viridifrons A. v. rowleyi A. v. viridifrons x rowleyi? A. v? wagneri 16°N 97°W 95°W Figure 1. Distribution of Green-fronted Hummingbirds in the state of Oaxaca. Dotted line indicates the range of wagneri, dashed line indicates the ranges of nominate viridifrons and rowleyi. l=Putla de Guerrero, 2 = km 136. SWR: sympatry of rowleyi and wagneri (vicinity of Tototalpan SE to Nejapa and El Camaron). SWV: sympatry of nominate viridifrons and wagneri (12 miles NE of Juchitan). cinnamon tips to their upperparts and in particular by pale tips to their outer rectrices. Colour charts do not treat metallic or iridescent colours, and colour descriptions in the following accounts are my own interpretations. Most of the colours should be self-evident, copper being redder than bronze, cinnamon being redder than vinaceous, etc. Purplish- copper indicates copper tinged with purple, etc. The characters of the birds from these four areas (comprising three forms) are as follows, including available data on nesting periods derived from Binford (1989), Rowley (1966, 1984), juvenile specimens, and personal observations. Immatures examined include juveniles, but juveniles were excluded from culmen measurements (culmen range given in mm; followed by mean length). Amazilia viridifrons viridifrons (Elliot) Cyanomyia viridifrons Elliot, 1871, Ann. & Mag. Nat. Hist. (4) 8: 267. "Putla, Mexico" = Putla de Guerrero, Oaxaca. Diagnosis. Western population (see range, below). Upperparts. Crown blackish with oily green to bluish-green sheen in S; dark green. 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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