VOl 'i^n VIII J Saunders, Birds of Gallatin Co., Mont. 45 



156. Piranga ludoviciana. Western Tanager. — Summer resident 

 in the mountains, appearing to have a decided preference for fir forests, 

 as I have only noted it in this type. It arrives early in June and occurs 

 for a short time in cottonwood groves in the valleys. I have not noted it 

 later than Aug. 3. 



157. Progne subis. Purple Martin. — Both Mr. Thomas and I 

 noted this species in Bozeman during June and July. I believe that they 

 were breeding somewhere in the northwestern quarter of the town, but 

 we were unable to locate the spot. 



158. Petrochelidon lunifrons. Cliff Swallow. — Common sum- 

 mer resident. Very abundant in the Gallatin Valley, nesting under the 

 eaves of buildings. A few large colonies breed on cliffs along the Missouri 

 and Gallatin Rivers near Logan and Lombard. Arrives early in June and 

 leaves in August. 



159. Hirundo erythrogastra. Barn Swallow. — Common sum- 

 mer resident. Abundant in the Gallatin Valley, where I found it breeding 

 under low bridges over irrigating ditches about as commonly as in barns. 

 This species arrives in the latter part of May and leaves late in August. 



160. Iridoprocne bicolor. Tree Swallow. — Summer resident, 

 but more common in migrations. Richmond and Knowlton found a 

 colony breeding in a clump of cottonwood trees. I have noted it in the 

 breeding season but once, when a single pair had a nest in a building in the 

 busiest part of Main St., Bozeman. The birds were not there in 1909 and 

 the site was occupied by English Sparrows. This species arrives early 

 in May and leaves in September. 



161. Tachycineta thalassina lepida. Northern Violet-green 

 Swallow. — Common summer resident, breeding in limestone cliffs in 

 the lower mountain canons, below 6,000 feet. Colonies occur in the 

 canons of Sixteen Mile and Bridger Creeks and the Gallatin River. This 

 species arrives about the middle of May and leaves late in August. 



162. Riparia riparia. Bank Swallow. — Summer resident, but not 

 common. There are breeding colonies in banks along the East Gallatin 

 River and Bridger Creek. 



163. Stelgidopteryx serripennis. Rough-winged Swallow. — 

 Common summer resident. This species breeds commonly throughout the 

 valleys, usually with but a single pair in a locality. They arrive about 

 May 20 and leave late in August. 



164. Bombycilla garrula. Bohemian Waxwing. — Common winter 

 resident. This species arrives in the mountains in the last of October and 

 is seen in the valleys a few weeks later. Flocks occur all winter both in 

 valleys and in the mountains as high as 7,000 feet. In midwinter they 

 often visit Bozeman in large numbers and strip the mountain ash trees 

 of their berries. In the mountains they feed on cedar, juniper and bear- 

 berry. They leave in spring about the last of April. 



165. Bombycilla cedrorum. Cedar Waxwing. — ■ Summer resi- 

 dent. This species arrives later than most others, being noted first on 



