Bulmer, Walter, Jr., 1966-1967
Page 131
Image from the Biodiversity Heritage Library. Contributed by Smithsonian Institution Archives. | www.biodiversitylibrary.org
Transcription
Pterodoruma leucoptera Sic #14 - 27 July: Description: W pattern on wings formed by dark primaries, dark secondary coverts, and dark lower back. Light grey back and necks contrasting with black cap that extends below eye, and black side of neck forming an incomplete chest band. Under wing white without black borders. Tail and rump grey. Legs and distal 1/3 of feet blue, proximal 2/3 of feet black. Behavior: Observed singly in warm water from S. Grid S to Samoa and N. to Tonga Is. (2) Sic #15 - 5°N. One bird followed the ship for 3 hrs, feeding out of range off the port side above description except for dark border under wing like Black-winged petrel. The "W" on back, black cap, and dark chest were clearly observed by persons aboard ship. (3) S. Grid off Howland Is. 20 Sept A bird coll. by F. Smith, field #24 was observed from drift and chased until coll. Description: Sooty black above with faint "W" on wing, sooty grey below except a white throat. Under wing dark grey to black with a white mark along anterior side of humerus. Blue feet, small slender bill. Comment: Alexander describes this bird as P.I. birds along with the birds described above. This form is noticeably smaller, and smaller billed, likely being drastically differently colored. It may represent a dark phase? Leucoptera brevipes from a different pop. on a different island!