Birds of the Rockies - novelonlinefull.com
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754. =Townsend's solitaire.= MYADESTES TOWNSENDII. Common resident; breeds from 8,000 to 12,000 feet; winters in mountains, though stragglers are sometimes seen on the plains. The author saw a pair on plains near Arvada, in company with a young, well-fledged bird.
756a. =Willow thrush.= HYLOCICHLA FUSCESCENS SALICICOLA. Summer resident; rather common; breeds in foothills and parks up to about 8,000 feet.
758a. =Olive-backed thrush.= HYLOCICHLA USTULATA SWAINSONII. Rare migrant.
758c. =Alma's thrush.= HYLOCICHLA USTULATA ALAMae. Rare summer resident; in migration common.
759. =Dwarf hermit thrush.= HYLOCICHLA AONALASCHKae. Rare migrant.
759a. =Audubon's hermit thrush.= HYLOCICHLA AONALASCHKae AUDUBONI. Common summer resident; breeds from 8,000 feet to timber-line.
759b. =Hermit thrush.= HYLOCICHLA AONALASCHKae PALLASII. Rare migrant; comes to the eastern edge of Colorado, just touching range of _auduboni_.
761. =American robin.= MERULA MIGRATORIA. Summer resident, but not common; some interesting questions arise in connection with intermediate forms.
761a. =Western robin.= MERULA MIGRATORIA PROPINQUA. Abundant summer resident; breeds from plains to timber-line.
765a. =Greenland wheatear.= SAXICOLA OENANTHE LEUCORHOA. European species; a straggler taken at Boulder by Minot.
766. =Bluebird.= SIALIA SIALIS. Rare summer resident; west to base of Rockies.
767a. =Chestnut-backed bluebird.= SIALIA MEXICANA BAIRDI. Summer resident; not common; western form, coming east as far as Pueblo.
768. =Mountain bluebird.= SIALIA ARCTICA. Abundant summer resident; breeds from plains to timber-line; in autumn roams up to at least 13,000 feet.
