Field notes, v504
Page 265
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
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