OLIVE-BACKED THRUSH 



FIG. 89.^ Turdus grayi casius 

 (Nat. Size) 



chin and throat pale buff streaked with olive; 

 remainder of under parts brownish buff. k Bill 

 greenish yellow; feet pale yellow. 



Very like our American Robin in every respect 

 barring color. Exceedingly common in all parts 

 of the Zone. The first nests of the year I 

 found in February. Its call notes are somewhat 

 like those of the American Robin, but its song is 

 much sweeter and more musical, varying in the 

 different phases of the breeding season from 

 wooing, to reassuring notes during the period of 

 incubation, and to a paean of triumph after the 

 young are hatched. 



2. Hylocichla ustulata swainsoni (Cabanis) 

 Olive-backed Thrush 



Sexes alike. Length 163 mm. (6.40 in.); 

 tail 68 mm. (2.70 in.). Above olive, region in 

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