COSTA'S HUMMINGBIRD 361 



Angelo, Kerrville, San Antonio, and Losoj'a Crossing). South to 

 southern Texas (Losoya Crossing, Somerset, and Cliisos Mountains) ; 

 southern Chihuahua (Rio Sestin) ; southern Sonora (San Javier and 

 Guaymas) ; northeastern Baja California (Cerro Prieto) ; and south- 

 ern California (Palo Verde and San Diego). West to California 

 (San Diego, Escondido, Santa Barbara, Gilroy, Marysville, and 

 Dales) ; Oregon (Prospect and Eugene) ; Washington (Prescott and 

 Yakima) ; and southwestern British Columbia (probably Brentwood). 



Winter range. — During the winter season this species is apparently 

 concentrated in the region from extreme southern California (Palm 

 Springs and San Diego) ; south to Guerrero (Venta de Zopilote and 

 Chilpancingo) ; and the Federal District of Mexico (Mexico City). 



One was seen at Marysville, Calif., on December 23, 1910, while 

 another was noted at Fresno on January 8 and again on January 18, 

 1937. 



Spring migration. — Early dates of spring arrival are: Texas — 

 Kerrville, March 11; San Antonio, March 27. New Mexico — Rodeo, 

 April 9. Colorado— Ouray, May 10; Fort Lewis, May 12; Grand 

 Junction, May 20. Montana— Columbia Falls, May 17; Cornwallis, 

 May 29. Arizona — Phoenix, February 10 ; Paradise, April 1 ; Tomb- 

 stone, April 21. California— Santa Barbara, March 27 ; Los Angeles, 

 April 3. Oregon — Prospect, April 10 ; Corvallis, April 15 ; Portland, 

 April 22. Washington— Yakima, May 13 ; Pullman, May 28. British 

 Columbia — Victoria, May 4 ; Agassiz, May 13. 



Fall migration. — ^Very little information is available concerning 

 the fall movement, but late dates of departure are: Washington — 

 Yakima, September 18. Oregon — Coos Bay, August 10. California — 

 Los Angeles, September 3. Texas — Somerset, November 4. 



Casual records. — A specimen was collected at Kearney, Nebr., in 

 August 1903. 



Egg dates. — California: 105 records, April 3 to September 3; 53 

 records. May 8 to June 6, indicating the height of the season. 



Texas : 20 records, April 4 to June 12 ; 10 records, April 12 to 21. 



CALYPTE COSTAE (Bourcier) 



COSTA'S HUMMINGBIRD 



Plates 5^61 



HABITS 



This little feathered gem is, to my mind, the prettiest of all the 

 North American hummingbirds. The gorgeous, glowing colors of 

 its brilliant helmet adorn, in the male, the top of the head, the throat, 

 and the elongated feathers on the sides of the gorget; the burnished 

 metallic violet of these feathers changes in certain lights to royal 



