Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
14 Jan
on board "Golden Bear" of Baja Calif., Suv, Mex.
They seem to dip down much in the manner of a swallow
gathering mud or drinking. If they are feeding they
seem to be taking something kicked up
by the propellers. From the bow saw a group of 7
white rumped reach Petrels and 2 petrels which
sat on the water with wings folded down, floating high
on the water. Saw 3-4 jellyfish. By about 8 PM
there were 20+ petrels, all reach following the boat.
The afternoon symposium was short and got up
about 3:30. There was a great cloud of 50+
petrels following the boat, but 1 reache's. A Black
Petrel which offered good comparison. The wing beats are
much deeper, and they tend to glide quite rapidly between
separate wing strokes and longer between bouts of strokes.
They stay much further back from the boat than the reach's,
which came within 50-75 feet. The size difference is very
conspicuous. From the bow saw 2 Booty Terns,
which I first identified as a Trugubrid, circling
high over the horizon & then flew off to the W as we approached. Didn't get a good look. Also saw 3-8 porpose,
uniforue dark olivaceou [drawing of dolphin], slightly lighter below.
moving N & paid no attention to the boat. When I
went back to the rear of the boat about 4:30 only,
about 10-20 Petrels following. They seem to have two
sorts of wing beats, a deep, arch [drawing of wings] body lengths,
and a high arc [drawing of wings], which were given more rapidly
as the bird turned and dropped (after food). Couldn't