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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
Bill Arvey Journal
July 31 Pt Lobo - Pre fledging Western has been seen on Bird Island.
Most of the observed Westerns have been adults here.
Also dodging among the Cormorant nests [illegible] are 1-4 Black
Tornstones. Their calls may be heard above the gulls at
times. These birds walk around the rocks presumably picking
off fleas.
Many of the cormorants can be seen fluttering the gular area
as they sit in full brooding position (or incubating). Whether
the nesting season is almost terminated is difficult to determine
because many are in tight nest protection positions and
one cannot see nest contents. A high proportion of
large young can be seen however. In colony 1, many
young appear to be > 2/3 grown, young cannot be seen
in early developmental stage, altho this may be present
beneath parents. Many birds are scavenging around w/
seaweed. Some nests are being broken up and carried away.
10:05AM. Coming and going to colony is at a very low ebb.
we will hereby concentrate observations on 3 nests in group
3. They form a triangle with its apex toward us.
Nest 1, 1 adult sits incubating or brooding closely w/ mouth 1/2
open fluttering gular area. At 10:08 appears to be alone.
Nest 2 contains 3, 1/2 grown young. An adult stands
over them, not brooding at 10:09.
Nest 3 at right side of triangle contains 2 or 3(?) from 1/2 to 2/3
grown young. On parent guards, w/ back to us at 10'10