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!