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Sept, 1914 SURVEY OF BREEDING GROUNDS O1 ? DUCKS 229 Shore-birds.--Two or three pairs of Avocets (Recurvirostra americaaa) were seen and one nest was found. This was placed in the middle of a grassy island. Killdeer (Oxyechus vocffer?s) were common nesters in the vicinity, and a man reported that he had seen several downy young. Around one pond were about fifteen Stilts which behaved as though nesting. TULE LAKE, OREGON AND CALIFORNIA Tule Lake is surrounded by lava beds, and lacks the needed growth of vegetation on its shores 'to make it a favorable nesting ground for ducks. Along the north shore, near the mouth of Lost River, in Oregon, there is some marsh land and a good growth of tules; but on the other sides of the lake sage-covered lava hills rise abruptly from the water's edge. Even under such circumstances; Mallards are reported to nest, selecting sites out in the sage brush away from water. While in this locality, June I to 3, we camped on Fig. 68. NEST OF REDHEAD CONTAINING SIX EGGS OF THIS DUCK AND ONE EGG OF THE RUDDY DUCK (l?rismatura ?am?ice?i$); TITLE LAKE, ?O?; J? 2, 1914. ColweH's ranch near Me?, Oregon, at the mouth of Lost River. ?m this po?t we were able to work the noah shore ? Oregon and the west shore over the Hne in Ca?o?ia. An? plat?h?os. Mallard. Numbers of MaHar? ?doubted? breed along the no?hern shore. Several lone males and a few pairs were seen, but no nests or yo?g were fo?d. M?a ?e?cana. Redhead. In this vic?ity Re?ea? appeared to be more common than Mallard. Flocks of seven to ten were often obse?ed in open places between the tules. A nest newly const?cted of ?een tules con- ta?ed no eg?; but several feathe? in it were ce?a?ly those of a Re?ead. On J?e 2 we fo?d a Coot's nest which conta?ed a set of eight eggs of the Coot and one egg of the Re?ead (see fig. 67). On the same day we fo?d a nest of a Redhead with six eggs of this duck and one egg of the Ruddy (see fig. 68). The nest was a platfo? of dried l?t-year's bu?shes fixed among