i888.] Merrill oh Birds of Fori Klamath, Oregon. 36 1 



groves of aspens with pine trees growing among them. They feed 

 mostly among the aspens, searching for insects after the manner of their 

 allies; at intervals they fly up into the pines, but soon descend to renew 

 their search for food, sometimes visiting the wild currant bushes, but 

 rarely touching the ground. When alarmed, as they very easily are, the 

 males move rapidly through the trees, often flying a hundred yards or 

 more at once, and were it not that their constant song indicates their 

 movements, it would be impossible to follow them. I have frequently 

 followed one for half an hour or more before I could even catch a glimpse 

 of it, and my pursuit of any particular one was more often unsuccessful 

 than the reverse. Sometimes on being alarmed one would at once fly up into 

 a lofty pine, and far out of reach of small shot would remain quietly on one 

 branch, yet singing often, as long as I remained in the vicinity, and this 

 it would do whenever I visited its especial haunt. On the whole the 

 habits of the Calaveras Warbler in this locality are very characteristic, 

 and in a somewhat extended field experience I have never found a land 

 bird more wary and diflicult to shoot. But as soon as the young leave the 

 nest this extreme shyness disappears, and the parents are readily ap- 

 proached and observed as they busily search for food for their young family. 

 Dendroica aestiva morcomi. — Common, arriving early in May. One 

 nest was found in a young pine, although many aspens, in which they 

 generally build, were growing near. 



Dendroica auduboni. — Extremely abundant during the migrations. A 

 few males were seen at Modoc Point on theSth and 9th of April, and at the 

 Fort on the 15th ; by the 20th they were quite plentiful. A second " wave" 

 composed of both males and females, which latter had not previously been 

 seen, arrived about the 4th of May, when they suddenly became more 

 abundant than ever, bringing D. cestiva morcomi and H. lutescois with 

 them. By the middle of the month there was a noticeable diminution in 

 their numbers, and ten days later they were rather uncommon, but a few 

 pairs remained to breed about the Fort and in the surrounding mountains. 

 Besides the common song Audubon's Warbler has another, quite difl'er- 

 ent and more rarely heard, and which caused the sacrifice of several speci- 

 mens to identify the species; this seems to be reserved for the middle of 

 the day when, after a satisfactory morning's search for insects, the bird 

 sits quietly for an hour or more on the same branch, occasionally uttering 

 the notes referred to. On two or three occasions I have heard a verv 

 sweet and peculiar song by the female, and only after shooting them in 

 the act of singing could I convince myself of their identity. 



Dendroica townsendi. — On the 14th of May I shot a male that was 

 searching for insects near the top of a fir. 



Dendroica occidentalis. — A full-plumaged male taken May 12; the bill 

 of this specimen was dark olivaceous, not "jet black " as stated in ' His- 

 tory of N. A. Birds.' It is probable that this and the preceding species, 

 and also D. nigrescens, are not uncommon here during the migrations, 

 but their habit of frequenting the upper third of the highest firs renders 

 their collection a matter of great difficulty, and the height is too great to 

 identify them by sight. During the month of June I frequently heard 



