462 Birds of Colorado 
Grinnell’s Water-Thrush. Seiurus noveboracensis notabilis. 
A.O.U. Checklist no 675a—Colorado Records—Henshaw 75, p. 204; 
Minot 80, p. 227 ; Cooke 97, pp. 116, 169 ; 04, p. 105; Henderson 03, 
p. 237; 09, p. 239; Chapman 07, p. 234. 
Description.—Adult—Above throughout brown, with a slight tinge 
of olive ; a conspicuous line above the eye white with a tinge of buffy ; 
under-parts white with a faint wash of yellowish, heavily streaked 
throughout with black ; iris brown, bill dusky, leg pale brown. Length 
(of a female) 5-20 ; wing 2-80 ; tail 2-20 ; culmen -50 ; tarsus -75. 
The sexes are alike, and the seasonal variation is very slight. This, 
the western subspecies, is distinguished from the typical form by its 
longer bill, browner upper- and whiter under-parts. 
Distribution.—Breeding in western North America from Alaska to 
Minnesota and Nebraska; on migration southwards, through the 
south-eastern Atlantic states to the West Indies, Mexico, Central and 
South America. 
Grinnell’s Water-Thrush is only a straggler on migration in Colorado. 
It was noticed at Denver May 12th, 1873, by Henshaw ; at Fort Lyon, 
May 6th, 1886, by Thorne ; at Boulder by Minot and at Loveland by 
Cooke, while Aiken observed it near Cafion City in May, 1873, and 
obtained a specimen, now in the Colorado College Museum, near Limon 
May 23rd, 1900; he also informs me he saw six examples at Butte 
on May 3rd, 1908. There is another example in the State collection at 
Denver, obtained May 14th, 1904, at Boulder by Bragg (Henderson). 
Habits.—Like the Oven-Bird, this species is for the 
most part a ground-bird and a walker, haunting swamps 
and deep woodland bogs, and giving vent to a sudden 
and loud vivid song. It is generally regarded as the 
most notable musician among the Warblers. 
Genus OPORORNIS. 
Bill as in Dendroica with the rictal bristles weak, sometimes obsolete ; 
wings comparatively long and pointed, about 3} times the length of 
the tarsus; plumage green, yellow and slate, without spots or bars 
on the wings and tail. 
Four species, all breeding in the United States. 
For key, see p. 439. 
Connecticut Warbler. Oporornis agilts. 
A.O.U. Checklist no 678—Colorado Records—Aiken 00, p. 298; 
Cooke 97, p. 219; 04, p. 110; Chapman 07, p. 241. 
