PYGOPODES: Diving Birds 



HORNED GREBE 



(3. Colymbus auritus) 13 in. 



Summer: Head black, with buffy plumes behind, and chest- 

 nut before eye; fore-neck, chest, and sides chestnut; back blackish; 

 belly white. Thick pads of long black feathers on the cheeks 

 give a "mutton-chop" effect, and when spread are very con- 

 spicuous. 



Winter: Grayish-black above, crown darker; white below, in- 

 cluding cheeks. In this plumage it is distinguished from the 

 Eared Grebe by slightly greater size, and by the white cheeks 

 which contrast strongly with the dark crown. 



EARED GREBE 



(4. Colymbus nigricollis californicus) Y2\ in. 



Summer: Upper parts, neck, and chest black; head conspicuously 

 crested; tufts of slender yellow-brown feathers on cheeks; flanks 

 chestnut, showing broadly below and behind the short wing; 

 breast and belly white. 



Winter: Gray-brown above; cheeks and throat gray; remaining 

 under parts white. No crest nor cheek ornaments. 



Downy young, black-and-white striped. A brood of these 

 youngsters, hatched a day apart and varying accordingly in 

 size, is a notable sight. 



FAMILY LOONS 



LOON 



(7. Gavia immer) 2i feet. 



Summer: Breast and belly white, otherwise black with rows 

 of white spots on back; wings white-speckled; neck with a com- 

 plete collar of narrow white stripes, and throat with a similar 

 partial collar. 



Winter: Dusky above, with or without white spots on back; 

 wings, white-speckled; white below, throat washed with gray. 



Young: Like winter adult, but without white on wings, and 

 with back feathers gray-edged, giving scaled appearance. 



