GRACE'S WARBLER 185 



In Illinois, Ridgway^ states "the Sycamore Warbler is a common 

 summer resident in the bottom lands, where, according to the writer's 

 experience, it lives chiefly in the large sycamore trees along or near 

 water courses," and Butler- in Indiana finds it in similar localities. 



So7ig. — "The call-note is a rather lively chipping, like that of an 

 agitated Parula Warbler, or perhaps somewhat more like that of Pine 

 Warbler. The song is like the Indigo Bunting's, much softened, and 

 and with a falling cadence all the way through; thus: See-wee, see- 

 wee, see-wee, swee, swee, swee, swee, — the last four notes uttered 

 more rapidly, but becoming fainter, until the last one is very indis- 

 tinct." {Allison, MS.) 



Nesting Site. — "In a fork far out on a high limb, usually in a 

 sycamore." (Butler^). 



Eggs. — Not distinguishable from the eggs of the preceding. 



Biographical References 



(i) R. RiDGWAY, Birds of Illinois, 150. (2) A. W. Butler, Birds of Indi- 

 ana, 1065. 



GRACE'S Warbler 



DENDROICA GRACI^ GRACI^ Baird Plate XIII 



Distinguishing Characters. — At all seasons adults and young may be known 

 by their yellow throat, gray auriculars, and bluish gray or brownish gray back. 

 The resemblance to D. dominica is striking but the lack of black in the cheeks 

 and its usual presence in the back, of adults, at least, the yellow, instead of 

 white mark below the eye, etc. are distinguishing marks of grades. Length 

 (skin), 4.50; wing, 2.55; tail, 2.00; bill, .38. 



Adult c?. Spring. — Above bluish gray, crown with black spots which form 

 a stripe along its sides, lores dusky, spot below eye yellow ; broad line from 

 bill to above eye yellow terminating in white just behind the eye; center of 

 back usually spotted with black; tail black edged with gray; two outer tail- 

 feathers largely white the outer webs usually white except at tip and base, 

 third feather spotted with white on inner web near tip; wings margined with 

 gray, the greater and median coverts tipped with white forming two conspic- 

 uous bars ; throat and breast yellow sharply defined from the white underparts ; 

 sides streaked with black. 



Adult 3, Fall. — Similar to adult c? in Spring but upperparts washed with 

 brown, the black marks of crown, back, and sides obscured. 



Young 3, Fall. — Similar to adult d" in Fall but browner above and on sides 

 and belly, little or no black in back, less on crown and sides. 



Adult 9, Spring. — Similar to adult c? in Spring but browner above, few or 

 no streaks in back ; crown and sides with less black ; yellow duller. 



Adult $, Fo//.— Similar to adult $ in Spring but browner above, black 

 markings more or less concealed by brownish tips. Not certainly distingfuish- 

 able from adult c? in Fall. 



Young 5, Fall. — Resembling young (^ in Fall. 



