1914] GrhuuU: Mammals and Birds of the Colorado Valley 121 



Fulica americana Gmelin 



Coot 



Noted but sparingly : Six seen on a tule pond below Ehrenberg, 

 March 25. Several noted along margins of the main river near Pilot 

 Knob, May 9 to 15; here they found concealment among the over- 

 hanging masses of cane trailing in the water. Two specimens taken, 

 nos. 12652, 12653. 



Pisobia minutilla (Yieillot) 



Least Sandpiper 



A band of eight seen February 24. and another of a dozen Febru- 

 ary 27, on the Arizona shore a mile above Mellen ; they were at the 

 margin of an overflow pond. About a dozen were found similarly on 

 the California side eight miles east of Picacho. Two specimens, nos. 

 12654, 12655, were secured there April 20. 



Actitis macularius (Linnaeus) 



Spotted Sandpiper 



Frequently observed all along the river, on both sides, practically 

 throughout the period of our work. First seen, two individuals, Feb- 

 ruary IS, a little below Needles; last seen, six individuals, May 9, near 

 Pilot Knob. In spite of the lateness of the last date, there was no 

 evidence leading to the belief that the species breeds in the region. 

 Two specimens, nos. 12656, 12657, taken March 20 near Riverside 

 Mountain and March 31 near Palo Verde, are in winter plumage; a 

 third, no. 12658, taken May 1, four miles below Potholes, is in full 

 summer plumage. 



Oxyechus vocifems vociferus (Linnaeus) 



Killdeer 



Noted sparingly, not more than a pair at one time, but at a num- 

 ber of points and almost throughout the season : Above Mellen. Feb- 

 ruary 23 ; above Bill Williams River, March 14 ; near Riverside Moun- 

 tain. March 17 ; opposite Cibola, April 1 ; eight miles east of Picacho, 

 April 19 ; four miles above Potholes, April 23 ; five miles above Lag- 



