96 



Bulletin American Museum of Natural History. [Vol. XXXVI, 



Tropical Zone in Colombia as a whole, we may attempt to describe and define 

 its faunas. 



The range of temperature throughout the zone is so small that this 

 factor has not to be considered in determining faunal boundaries. Humid- 

 ity, character of the soil, and ease of access are the agents which have been 

 active in faunal development in Colombia. Of these the first is by far the 

 most important. The arid upper Dagua basin, on the western slope of the 

 Western Andes, is surrounded by the humid forests of the Colombian- 

 Pacific Fauna and Subtropical Zone. Nevertheless, its life was derived 

 through the Cauca Valley from east of the Andes, suitability of environ- 

 ment as it is controlled by rainfall, here proving far more potent than ease 

 of access from immediately contiguous regions, which do not possess species 

 adapted to an arid habitat. 



Birds of the Tropical Zone. 



Family Tinamidm. 



Tinamus major ruficeps 

 " " castaneiceps 



" latifrons 



Cr3rpturus cinereus 

 " berlepschi 

 " soui soui 

 " " caquetae 



" " caucse 



" " modestus 



" adspersus yapura 

 " variegatus salvini 

 " kerrise 



Family Cracidce. 



Crax aleotor 

 " panamensis 

 " alberti 

 Penelope ortoni 



" jaoq^iaQU 

 Ortalis columbiana columbiana ' 

 " " caucsE 1 



" guttata 

 " garrula 

 Pipile cumanensis 



Family Odontophoridce. 



CoUnus oristatus decoratus 

 ~ " "^ reucolTs^ 



Colinus cristatus parvicriatatuB ' 

 Odontophorus guianensis marmoratus 



" parambse 



Rhynchortyx cinctus australis 



Family ColumhidcB 



Columba speciosa 

 " rufina 

 " goodsoni 

 " subvinacea berlepschi 

 " plumbea propinqua 

 Zenaida auriculata 



" ruficauda robinsoni 

 Chsemepelia passerina albivitta 

 " " parvula 



" " nana 



" minuta elseodes 



" rufipennis rufipennis 



" " caucse 



Claravis pretiosa livida 

 Leptotila verreauxi verreauxi 

 " ruf axilla dubusi 

 " " pallidipectus 



" plumbeiceps 

 " pallida 

 " cassini 

 Osculatia purpurata 

 Oreopeleia veraguensis 

 " montana ^ 



1 Ranging upward to the Subtropical Zone. 



