eio 
ECONOMIC RELATIONS OF OUR BIRDS. 
Family COLYMBIDJ:: Loons. 
289. COLYMBUS TORQUATUS, Brunn. GREAT NORTHERN DIVER. Group 
II. Class c. 
This large species is still not uncommon, but is steadily retiring. It is a sum¬ 
mer resident and breeds regularly. 
Food: Fish (Wilson). 
290. CoLYMBUs ARCTicus. BLACK-THROATED DIVER. Group II. 
Class c. 
In regard to this species Mr. Nelson says: “ A very rare winter visitant on 
Lake Michigan. There is a specimen in Dr. Hoy’s collection, taken at Racine, 
and a second specimen was captured and preserved at Milwaukee. 
291. COLYMBUS SEPTENTRiONALis, LiNN. RED-THROATED DIVER. Group 
II. Class c. 
Said to be not uncommon during the winter on Lake Michigan. 
Family PODICIPID.® : Gteebes. 
292. PoDiciPES CORNUTUS (Gm.), Lath. HORNED GREBE. Group II. 
Class c. 
A migrant not very common. A specimen was taken at Berlin, May 4, 1874, 
and is now in the High School Cabinet. 
Food: Insects, fishes, crabs, fresh and salt water shells (De Kay). On salt 
water, shrimps, fishes and crabs; on fresh water, insects, leeches, small frogs, 
tadpoles and aquatic insects (Audubon). 
29S. PODICIPES GRISEIGENA HOLBGELLI (Reinh.), Coues. AMERICAN RED¬ 
NECKED GREBE. Group II. Class c. 
Said to be rare and found only in winter on Lake Michigan. 
Food: Smallest fry, amphibians, reptiles, insects and vegetables (Audubon). 
294. PODICIPES AURITUS (LiNN.), Lath. EUROPEAN EARED GREBE. 
Group II. Class c. 
Mr. Nelson speaks of this species as rather common on Lake Michigan in 
winter, and Dr. Hoy states that it nests on the margin of small lakes, and is a 
common species. 
Food: Fish, aquatic insects, small reptiles and seeds of aquatic plants 
(Audubon). 
295. PODILYMBUS PODICIPES (LiNN.), LA^VR. RED-BILLED GREBE; DAB- 
CHICK. Group II. Class c. 
This is a very common species. A pair or more is to be found upon almost 
every pond and stream. 
Food: Of six specimens examined, two contained fifteen dragon-fly larvae; four, 
fifteen water-scorpions; one, seven shells; one, nine insects; one, a small bone; 
and every one a rather large pellet of feathers. 
Small fry, plants, seeds, aquatic insects and snails (Audubon). 
