GREBES. 



67 



ing season exclusively on fresh water. Only during the migrations and winter-time 

 are they to be found at sea. 



The crested grebe (Colynibus cristatus), the species represented in the cut, is one 

 of the largest of the genus. It has formerly been considered an inhabitant of this 

 continent, but, as it seems, quite erroneously, it being confined to the temperate parts 



FIG. 30. Colymbus cristatus, crested grebe. 



of the Old World, including Europe. The western grebe (^Echmophorus occidentalis) 

 inhabits the western and southwestern portion of the Nearctic region. It is charac- 

 terized by its extremely elongated neck, long and slender bill, and by the absence of 

 parti-colored ruffs or crests. Podiceps dominicanus, from South and Central America, 

 represents in the New World the well-known European dab-chick (P../?uwata7s),both 

 very small species, destitute of crests or ruffs, the latter represented all over the Old 



