Perching: Birds Marked With Blue 



766. Bluebird (Sialia sialis) . L. 7. Aa.^. Above, 

 including wings and tail, bright blue; throat and breast 

 rusty brown, belly whitish. Ad. 9 . Above grayer, 

 below paler. In winter specimens of both sexes ^ have 

 upperparts tipped with ruSty. Notes. Call, lur-wee, 

 tur-wei: song, a rich and sweet but short warble. 



Ranee. — Eastern United Slates; breeds from (he Gu[f Slates lo 

 Nova Stutla and Manitoba; wInlSrS from southern New Eilgland and 

 soull^eji^ Illinois southward: 



766a. Azure Bluebird (5. s. a^urea). Similar to 

 No. 766, but breast paler, upperparts less deep, more 

 cerulean. 

 76f , Range. — iVountalns of eastern Mexico north to southern Arizona. 



767, Western Bluebird {SiaJiamexicanaoccidsntalis). 

 L. 7. Ad. (J'. Above bright biue,for(!backwitfi more or 

 less rust-brown, but -rarely wholly chestnut; tkroat 

 fi^w, breast rust-brown, belly bluisn gray. Ad. ?. 

 Above grayish blue; rust on foreback faintly indicated; 

 throat bltiibh gray, breast palef than in J'. Nohi. 

 Calli suggests that of No. 766, but is louder and 

 wilder. 



Rang-e. — Pacific coast region from northern Lower California north 

 to Brlti^li Ci'luiiitiJa. east lo -western Nevada and casually, during ml- 

 gratloiis, to New Mexico. (Rldg^'^i'-) 



7 6 7a. Chestnut-backed Bluebird (5. m. bairdi). 

 Similar to No. 767, biit foreback wholly rust-brown. 



Range.— Rocky Mountain. (egluii fiom Wyoming south into Mexico. 



767b. San Pedro Bluebird (5, m. anabelce). 

 Rust-brown ot back and breast greatly reduced in ex- 

 tent, usually wholly wanting or barely indicated on 

 back, and divided into two patches on breast by back- 

 ward extension of blue of throat; \V. 4.2. (Ridgw.) 



Range,— San Pedro Mariir Mountains. Lower California. 



768. Mountain Bluebird {SiaUa arctica). L. 7.5. 

 Ad. (^. Above beautiful cerulean blue, throat and 

 breast paler, belly whitish. Winter specimens arc 

 more or less tipped with brownish. Ad. 9- Above 

 bmwnish gray, rump blue, throat and breast gra>- 

 ish buff'; belly whitish. Notes. Call, suggests thai 

 of No. 766, but in fall Is merely a feeble chirp. 

 (Ridgw.) 



Range. — Western United States, except Pacific coast; breeds from 

 the Sierra Nevada east to tlie'Plalns and from New Mexico nortn 10 

 (he Great Slave Lake region; winters from the Mexico boundary 

 states south Into Mexico. 



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