THE BLACK-THROATED GRAY WARBLER. 



187 



Recognition Marks. — Warbler size: Jilai.'l'; and white and l)lue-ijray colora- 

 tion distinctive. 



Nesting. — Xcst: a rather loosel)- huilt strnetnre of dead grasses, silky plant 

 fibers, moss, etc., ])laccd midway on horizontal limb of conifer 25-50 feet from 

 ground; measures, externally, 3 inches wide by 2 deep, internally i-)4 wide by i 

 deep. Eyys: 4, creamy white, marked, chiefly about the larger end with spots 

 and small blotches of varying shades of brown, lavender and black. Av. size, 

 .83 X .63 (21 X 16). Season: last w'eek in May and first week in June; one brood. 



^' 





rfiii(u\)5vooi^s 



BLACK-THKOATED GRAY WAUULEkS, MALE AND FEMALE. 



General Range. — Western United States (north to Colorado, Utah and 

 Washington), and British Columbia west of the Cascades; breeding southward 

 to Southern California, southern Arizona and J^ower California; south in winter 

 thru Mexico and States of Oaxaca and Vera Cruz. 



Range in Washington. — Summer resident and migrant west of the Cascade 

 Mountains. 



Migrations. — Spring: Seattle-Tacoma c. .\pril 12. 



Authorities. — Sylvia nigresccns Townsend, Journ. 

 1837, 191 ("forests of the Columbia River"). CXS. T,' 



Specimens. — U. of W. Prov. B. E. 



PaU:c. Sept. i (Blaine). 

 Ac. Nat. Sci. Phila. VIL 

 . n'(?). Ra. Kk. B. E. 



