220 Univt rsity of California Publications in Zoology [Vol. 10 



Just as with life zones and fauna] areas, we find many species, 

 of wide dispersal through two or more of even the major asso- 

 ciations. For such cases various modifying terms become neces- 

 sary. 



In thus attempting to bring some degree of order into the 

 distributional treatment of the species of a large area, we would 

 urge a reasonable limitation. For efforts of this sort serve to 

 impress upon the student the fact that there is the reverse of 

 uniformity in the behavior of species. In fact if we should 

 carry our analytical processes far enough, we should doubtless 

 find that no two species anywhere exist under precisely the same 

 set of conditions: hence the dependent conclusion that no two 

 species occupy precisely the same area. 



CHECK-LIST OF THE BIRDS 



PAGE 



I. c.ilymlius nigricollis californicus (Heermann) 224 



i'. Podilymbus podiceps (Linnaeus) 224 



3. Phalacrocorax auritus albociliatus Eidgway 224 



4. Anas platyrliynclios Linnaeus 224 



5. Dafila acuta (Linnaeus) 224 



6. Querquedula cyanoptera (Vieillot) 224 



7. Marila affinis (Eyton) 225 



S. Erismatura jamaicensis (Gmelin) 225 



9. Dendrocygna bicolor (Vieillot) 225 



10. Plegadis guarauna (Linnaeus) 225 



11. Botaurus lentiginosis (Montagu) 225 



12. Anloa herodias hyperonca Oberholser 225 



13. Nycticorax nycticorax naevius (Boddaert) 226 



14. Butorides vireseens anthonyi (Mearns) 226 



15. Fulica americana Gmelin 226 



16. Steganopus tricolor Vieillot 226 



17. Recurvirostra americana Gmelin 226 



18. Ilimantopus mexicanus (Miiller) 227 



19. Gallinago delieata (Ord) 227 



20. Pisobia minutilla (Vieillot) 227 



21. Ilelodromas solitarius einnamomeus (Brewster) 227 



22. Actitis maeularius (Linnaeus) 227 



23. Oxyechus vociferus (Linnaeus) 228 



24. Oreortyx pieta plumifera (Gould) 228 



25. Lophortyx californica vallieola (Ridgway) 230 



26. Lophortyx gambeli Gambel 231 



27. Columba fasciata fasciata Say 233 



28. Zenaidura maeroura earolinensis (Linnaeus) 233 



