













THE FAUNA OF MONTANA TERRITORY. 15 
WrsrERN Titmouse (P. occidentalis). Common in the 
Rocky Mountains, associating with the Mountain Titmouse. 
Mountain TrruovusE (P. montanus). Rather less abun- 
dant than the last, but alike in habits; call-note rather 
harsher. Both of my specimens are larger than more west- 
ern ones. Seen with the last named at Fort Dalles, Oregon. 
Rurous-BACKkED TrrwOUsE (P. rufescens). I met with 
this only in the dense forests of the higher Coeur d'Alene 
Mountains, along with Turdus nevius, Trogl. hyemalis, ete., 
the same group most common in the similar forests of the 
Coast Mountains in this Territory. It there seemed to have 
all the business of Titmice to itself, and in notes is easily 
distinguishable from any of the preceding, though similar in 
habits. I saw it nowhere else east of the nobiles. 
Hornep Lark (Eremophila cornuta). Abundant in the 
more open prairie districts everywhere. I found many of 
its nests along the Upper Missouri. 
Evenine Grospeak (Hesperiphona vespertina). During 
my residence west of the Cascade Mountains, in 1854, I 
often heard a call uttered by some bird flying above the tops 
of the highest trees, and audible for a mile in still weather. 
I heard the same among and near the Cœur d'Aleie Range, 
and saw the birds, but too high to distinguish the species. 
They made the cry only when flying from one tree to an- 
other, and when feeding among the top branches of the 
highest trees were so quiet that I never could even see them. 
I always supposed them to be the Evening Grosbeak, which 
they resemble in size, and Townsend’s observations of its 
habits and notes agree iu with these remarks. (Nuttall, 
Manual, 1840, Vol. I, p. 620). 
The habits of the Black-headed Grosbeak are quite differ- 
ent, as it lives commonly among bushes, or near the ground 
in open woods, and has no such cry. The birds seen may 
possibly, however, have been Pine Grosbeaks, which belong 
to the same long-winged group of arboreal finches, and were 
collected in these mountains in winter by Mr. Hildreth. 

