COLYMBID.E: Grebes 



COLYMBID^E (Family Grebes) have lobed feet; flat toe-nails; no tail; 

 short and weak wings; nest on floating vegetation of freshwater lakes. 

 GAVIID^E (Family Loons) have webbed feet; toes with claws; tail; 

 strong wings; and nest on shore or island of inland lake, close by water's 

 edge. Both have tarsus greatly compressed; are incredibly quick divers; 

 practically helpless on land. ALCID^E (Family Auklets, Murres, Puf- 

 fins, etc.) are sea-birds, mostly of small size; deep divers but not so modi- 

 fied for high speed as are the fish-catching Loons ; nest on or under rocks, 

 in earth burrows or in caves. 



W.V. Sept.- Apr. Com- 

 mon on ocean and tide-bays of 

 southern California. Less nu- 

 merous eastward, where water- 

 areas of inviting size are few. 

 Has been recorded on the Colo- 

 rado and Gila Rivers, and 

 doubtless occurs on large reser- 

 voirs constructed for irrigation 

 purposes. 



California Res. Com- 

 mon Nests among tules on 

 freshwater ponds and marshes 

 of the lower country. Winters 

 in same localities, occurring 

 also on ocean and Colorado 

 River. 



Arizona Less common. 



Pied- billed Grebe 



