130 Birds of Colorado 
paler rufous than in N. americanus, but with the inner webs of the 
primaries marbled with paler. Length 18; wing 10-0; tail 3-75; 
culmen 3-6; tarsus 2-7. 
A mounted example in the Aiken collection taken in the fall does 
not show the median pale stripe on the crown very clearly ; it is 
probably a bird of the year. 
Distribution.—Breeding chiefly far north in the Barren Grounds from 
Hudson, Bay to northern Alaska, south on migration to winter in the 
Gulf states and Lower California and through the West Indies and 
Mexico as far as Brazil and Chili. 
The Hudsonian Curlew is a rare migrant in Colorado, hitherto only 
recorded on one or two occasions from, the plains east of the mountains. 
Beckham first reported an example which he examined, and which was 
said to have beenshot near Pueblo. Thorne, and subsequently Morrison, 
noticed it near Fort Lyon on April 30th, 1885, and in early May, 1888, 
respectively. Hersey and Rockwell report it as rare in the fall migration 
at Barr. There is a single example in the Aiken collection, taken 
September 23rd, 1900, near Colorado Springs. 
Family CHARADRIIDZ. 
A large family containing the Plovers and their allies, 
in which the bill never exceeds the length of the head 
and is generally shorter; it ends in a characteristic 
convex, horny terminal portion—the dertrum; tarsus 
reticulate without scutes; toes, except in Squatarola, 
always three in number; webbing between the toes 
variable. (For key of genera, see p. 100.) 
Genus SQUATAROLA. 
Resembling in every respect Charadrius, but with a small and distinct 
hind toe, contrary to the general rule in the family. 
This genus contains only the Grey or Black-bellied Plover, a bird of 
wide distribution in both hemispheres. 
Black-bellied Plover. Squatarola squatarola. 
A.O.U. Checklist no 270—Colorado Records—Ridgway 79, p. 232; 
H. G. Smith 86, p. 285; 96, p. 65; Morrison 89, p. 181; Cooke 94, 
p. 183; 97, pp. 68, 201. 
Description.—In summer—Above mottled blackish and ashy-white ; 
upper tail-coverts chiefly white ; tail barred black and white ; primaries 
dusky with white on the inner webs; forehead, line over the eye and 
