Life Histories of North American [Birds]; Gulls and Terns

Life Histories of North American [Birds]; Gulls and Terns

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...the head is mottled with the same; there is a frontal black space at the base of the bill and usually a few dusky spots on the throat. In the gray phase the buff and brown tints are entirely replaced by light shades of "neutral gray" or "mouse gray," darker above and lighter below, the dusky markings on the upper parts being as described above. The juvenal, or first plumage is acquired during July, previous to the flight stage. The back, scapulars, and lesser wing-coverts are "hair brown" and "drab"; the feathers edged with "wood brown; " the greater wing-coverts are gray; the primaries are dusky black tipped with white; the secondaries are centrally black, basally gray, broadly tipped, and edged with white; the tertials are dusky, broadly edged with white; the head is mottled with dusky and whitish above, white below, with a black crescentic spot in front of the eye and a white spot below it, the upper tail-coverts are white; the tail is light gray, with a broad subterminal band of dusky; the under parts are pure white, or rarely tinged with rosy. The postjuvenal molt begins early in September and by November or December the first winter plumage is fully acquired by a partial molt, which involves everything but the wings and tail. The forehead is now largely white and the under parts are entirely so. The crown and occiput are mottled with dusky, the markings coalescing into a solid, slate-colored, nuchal collar, including the orbital and auricular regions; and the back is clear "gull-gray." This plumage is worn all winter until a complete molt occurs in May or earlier, which is practically a prenuptial and a postnuptial molt combined. This is a very peculiar molt, for, so far as I know, more

Product details

  • Paperback | 164 pages
  • 189 x 246 x 9mm | 304g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236542525
  • 9781236542526