. Birds of America;. Birds -- North America. 56 BIRDS OF AMERICA FORSTER'S TERN Sterna forsteri Niittall A. O. U. Number 69 See Color Plate 7 Other Names.— Havell's Tern (immature); Sea Swallow. General Description.— Length, 15 inches. Color, white with pale grayish-blue mantle. Tail, forked for half its length. Not distinguishable from either the Common Tern or the ."Xrctic Tern with speci- inens in hand. Color.— Adults in Summer: Crown, glossy black not extending below eye; mantle, pale grayish-blue; primaries strongly silvered; entire under parts and rump, white; the tzvo long
. Birds of America;. Birds -- North America. 56 BIRDS OF AMERICA FORSTER'S TERN Sterna forsteri Niittall A. O. U. Number 69 See Color Plate 7 Other Names.— Havell's Tern (immature); Sea Swallow. General Description.— Length, 15 inches. Color, white with pale grayish-blue mantle. Tail, forked for half its length. Not distinguishable from either the Common Tern or the ."Xrctic Tern with speci- inens in hand. Color.— Adults in Summer: Crown, glossy black not extending below eye; mantle, pale grayish-blue; primaries strongly silvered; entire under parts and rump, white; the tzvo long outside tail-feathers, ichite on outer iveb, dusky gray on inner; bill, orange-yellozv, terminal half, black with the tip yellow; feet, bright orange; iris, brown. AnuLxs in Winter: Crown variegated with white; nape, dusky; a distinct black bar on sides of head embracing eyes; outside tail-feathers. Tlie Caspian Terns nest in colonies through the lake region of southern Oregon. They gather on one of the tule islands. We found two of the largest colonies on Lower Klamath and IMalheur lakes, where these birds were living near a colony of California and Ring-billed Gulls. \Mien we first visited Lower Klamath Lake, in 1905, we found these Gulls and Terns together with White Pelicans, Farallon Cormorants, Western Grebes, and Great Blue Herons, gathered in what might have been called one immense colony in the titles shorter than in summer; bill, dusky except at base below ; feet, dusky yellowish. Nest and Eggs.— Nest: In marshes; constructed of dead reeds and stems of water plants and lined with finer reeds. Eggs : 2 or 3, varying from pure white or pale green to warm brownish-drab irregularly spotted with brown, umber, and lilac. Distribution.— North America at large; breeds in California, Oregon, Nevada, southwestern Saskatche- wan, and Manitoba south to northern Colorado, north- ern Nebraska, northeastern Illinois and southern Ontario, and on the coasts of Texas
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Keywords: ., bookauthorpearsont, bookcentury1900, bookdecade1920, bookyear1923
