Life Histories of North American Petrels And Pelicans And Their Allies : Order Tubinares And Order Steganopodes
The book Life Histories of North American Petrels And Pelicans And Their Allies : Order Tubinares And Order Steganopodes was written by author Arthur Cleveland Bent Here you can read free online of Life Histories of North American Petrels And Pelicans And Their Allies : Order Tubinares And Order Steganopodes book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Life Histories of North American Petrels And Pelicans And Their Allies : Order Tubinares And Order Steganopodes a good or bad book?
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NicoU (1906) noted that on Glorioso Island "at least 90 per cent of the gannets are brown- plumaged birds with white tails." Although these white-tailed brown birds are generally conceded to be Sula piscator and are so labeled in collections, I have always had a lurking suspicion that they might represent a distinct species and that perhaps Mr. C. J. Maynard (1889) was justified in naming them Sula coryi. Probably during the following year, the third year of the bird's life, the adult plumage i...s fully acquired ; I have seen -one bird, ap- parently about three years old, collected on July 25, which is in worn adult plumage except for some dusky mottling on the back. This bird, which had not yet molted, would probably have assumed the fully adult plumage at the next molt, the third postnuptial. I have seen immature birds undergoing the postnuptial molt as early as July 25,- as late as October 9, and at various intermediate dates. Adults I have seen molting in June and in August. Undoubtedly 83969—22 15 214 BULLETIN 121, UNITED STATES NATIONAL MUSEUM.
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