Field notes, v504
Page 380
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
Belour vista Pt., Marin Co., Calif Bill Arvey Journal (3) Nov. 4, 1960 the group of 5 cormorants, I've come to the con- clusion that the ones below are Pelagics, but the other 3 are Brandts. A good way to tell the Pelagics is the shape of the bill. The bill on the Pelagic is narrow all the way into the head, doesn't get thicker as it gets near the base, whereas the Brandts seems to get thicker and change the shape of the head near the base. More cormorants have landed in the meantime, and there are at least 10-12 cormorants on this rock, and most of them are Brandts, I believe. One has a very nice yellow throat patch that appeared to be feathered, not naked, so that would indicate a Double Crested Corm. Just watched a cormorant leave the rock, fly out about 300 yds., put down in the water. Just made a beautiful landing up on the rock--he flew in, glided, put his legs down, sort of popped right on this narrow little ledge. A young Brandts. Haven't seen any wingspread yet, but it wouldn't surprise me if one of these would do it. The one that just landed is displaying and is displaying a beautiful blue patch which is unusual for this time of year. He did this just after he landed. Now the patch deflates. This shows that this display can take place any time of year but is more intense as the breeding season approaches. 2:30: another 5-min. count: Out--12; In--