^".sris^l Merrill, Birch of Fort Shrriiuni, Idaho. 



1898 J 



21 



that it is distinctly unlike either occidoifalis or sepientrionalis, despite the 

 fact that it occupies a region lying between the respective ranges of these 

 subspecies and far removed from the known western limits of the range 

 of atricapillii$y 



Parus gambeli. — Abundani resident. Common in and ahfuit the fort 

 in winter, most going to the adjacent hills to breed. 



Parus rufescens. — This Chickadee is a fairly common resident in the 

 vicinity of Fort Sherman, though more frequently seen in the hills than 

 at lake level. Mr. Brewster informs me that local specimens are " iden- 

 tical in every respect" with skins from the coast of British Columbia. 



Regulus satrapa olivaceus. — Common resident, especially in winter, 

 most going up the surrounding hills to breed. A brood of fully fledged 

 young seen at the fort on June 19. 



Regulus calendula. — Arriving about the middle of April, this Kinglet 

 is verj' abundant by the first of May. A large number pass through to 

 the North, returning in September, but many remain to breed, and until 

 the middle of June the song of the males may be heard in every direction. 



Myadestes townsendii. — Not uncommon during the migrations, and I 

 found one pair nesting near the summit of Mica Peak. It is an early 

 migrant, arriving about the fiist of April, and I have taken a specimen as 

 late as December 22. 



* Turdus fuscescens salicicola. — Arriving about the twentieth of May, 

 this Thrush is rather common among cottonwoods bordering the lake 

 and river, where its sweet song may be heard towards evening. Nests 

 found here were from two to seven feet above the ground, and in con- 

 struction were essentially like those of the eastern form. 



Turdus ustulatus swainsonii. — Breeds rather commonly about the 

 lake and on Mica Peak up to the summit. 



Merula migratoria propinqua. — Usually arrives during the last week 

 in February and is abundant during the summer. 



Hesperocichla naevia. — First noted during the first week of March 

 when quite a number of males were found on the hillsides across the 

 river, and also among the thickets under cottonwoods at the outlet of the 

 lake. In 1896 the first were seen on April 3. They w^ere generally 

 flushed from the ground among dead leaves and alighting on a branch, 

 uttered their peculiar cluck which, among the dense underbrush or young 

 pines, often first attracted attention to the birds' presence. None were 

 observed in autumn, but their habits are such that they might easily 

 escape notice, and I have little doubt that some breed at no great dis- 

 tance f]-om the fort. 



Sialia mexicana bairdi. — Arrives late in February or early in Maich 

 and is abundant during summer. Some specimens taken here are. in 

 coloration, nearer occidentalis than bairdi. 



Sialia arctica. — Usually arrives a few days later than the preceding 

 species, and is less common at lake level, but is more generally distri- 

 buted and more common in the hills. One pair nested on the sheltered 

 corner of a rafter on the hospital porch. 



