LIFE HISTORIES OF MICHIGAN BIRDS.— PART I. WATER BIRDS. 



Order I. PYGOPODES.*— Diving Birds. 



KEY TO FAMILIES. 



A. Tail-feathers wanting; toes conspicuously lobed (Fig. 

 3) the nails of the anterior toes very broad and 

 flat.— Family 1, Colymbidse, Grebes, page 36. 



AA. Tail-feathers present but short. — B, BB. 



B.Toes four, hind toe present. — Family 2, Gaviida — 

 Loons, page 40. 



BB. Toes three, hind toe wanting. — Family 3, Alcida 

 — Auks and Murres, page 43. 



Fig. 3. Foot of Grebe. 



*The classiflcation and nomenclature adopted are those of the third edition, 1910, of the Check-list 

 of North American Birds prepared for tlie American Ornithologists' Union, and the number in paren- 

 theses following the scientific name is the species number used in the second edition of that checli-list 

 (1895). The number preceding each species name is the serial number of the present list. For an 

 outline of the classification used those interested may consult Appendix No. 5 near the end of the 

 volume. 



