The Birds of Denver 129 



175. Sitta canadensis — Red-breasted Nuthatch. Cheesman Park, 

 November 3, 1910. 



176. PantJiestes atricapillus septentrionalis — Long-tail Chicka- 

 dee. Regular winter visitor;, arrives early in October and departs 

 about April 15; often occurs well "down town." 



177. PantJiestes gambeli gambeli — Mountain Chickadee. Irregu- 

 lar winter visitor, Cheesman Park, October 29, 1915 to February 

 25, 1916, and seen occasionally all of the winter of 1916-17, in Chees- 

 man Park. 



178. Regulus calendula calendula — Ruby-crown Kinglet. Noted 

 in City Park, May 29, 1907, and April 28 to May 8, 1917. 



179. Myadestes townsendi — Townsend's Solitaire. Frequent in 

 migration and occasionally a winter resident; has been noticed in 

 City Park and Cheesman Park in February, April, August (24), 

 September, October and December. 



180. Hylocichla fuscescens salicicola — Willow Thrush. Seen in 

 Cheesman Park, September 12, 1913, and June 9, 1917. 



181. HylocicJila guttata aiiduboni — Audubon's Hermit Thrush. 

 Frequent in migration in all the parks and at times well "down 

 iown"; arrives early in May, sometimes remains until late in June, 

 and reappears late in August. 



182. Hylocichla guttata nanus — Dwarf Hermit Thrush. Cooke; 

 by Smith. 



183. Planesticus migratorius migratorius — Eastern Robin. Seen 

 wherever the next species occurs; not very common, but becoming 

 more and more so each year. Breeds. 



184. Planesticus migratorius propinqmis — Western Robin. A 

 common summer, and occasional winter, resident; the bulk appear 

 about the middle of March and leave about the middle of October. 

 Breeds, and eggs are often found by the middle of April. 



185. Sialia sialis sialis — Eastern Bluebird. Cooke; by Dille, 

 1899. 



186. Sialia mexicana bairdi — Chestnut-back Bluebird. One seen 

 in Cheesman Park, April 9, 1907. 



187. Sialia. currucoides — Mountain Bluebird. An infrequent 

 summer resident, but common in migration. Occurs most com- 

 monly from March to October, but also every other month in the 

 year. Would be a common breeder, if not driven out by the Eng- 

 lish Sparrow. 



