. Bulletin of the British Ornithologists' Club. Figure 2a. Recently fledged juvenile Beck's Petrel Pseudobiihueria becki, off Cape St George, New Ireland, Papua New Guinea, August 2007, showing the slighter and slimmer body than Tahiti Petrel P. rostrata (note the long/slender wings and elongated body); otherwise the two are virtually identical in shape and are identical in plumage. Note the evenly very fresh wing-feathers and mostly dark underwing-coverts (as in some populations of Tahiti Petrel P. rostrata, the underwing-coverts become whiter with age, forming a variable white band) (Hadoram
. Bulletin of the British Ornithologists' Club. Figure 2a. Recently fledged juvenile Beck's Petrel Pseudobiihueria becki, off Cape St George, New Ireland, Papua New Guinea, August 2007, showing the slighter and slimmer body than Tahiti Petrel P. rostrata (note the long/slender wings and elongated body); otherwise the two are virtually identical in shape and are identical in plumage. Note the evenly very fresh wing-feathers and mostly dark underwing-coverts (as in some populations of Tahiti Petrel P. rostrata, the underwing-coverts become whiter with age, forming a variable white band) (Hadoram Shirihai). Figure 2b. Beck's Petrel Pseudobulweria becki, off Cape St George, New Ireland, Papua New Guinea, August 2007: note the paler uppertail-coverts, similar to Tahiti Petrel P. rostrata, which in both species vary indi\ idualh- and with wear and bleaching; apparently an adult or immature due to appearance of some moult limits and feather bleaching (Hadoram Shirihai) i. 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 : British Ornithologists' Club
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