iS93 



Allen, Origin and Distribution of N. A. Birds. IAI 



Sula sula 

 Fregata aquila 

 Phoenicopterus ruber 

 Ardea occidentalis 

 Aramus giganteus 

 Columba leucocephalus 

 Zenaida zenaida 

 Rostrhamus sociabilis 

 Buteo brachyurus 



Polyborus cheriway 

 Speotyto cunicularia floridana 

 Crotophaga ani 

 Coccyzus minor maynardi 

 Euetheia bicoior 

 Ammodramus nigrescens 

 Vireo altiloquus barbatulus 

 Ccereba bahamensis 



The semi-tropical area occupying the extreme lower portion 

 of the Rio Grande Valley and extending as a narrow belt thence 

 northward for a short distance along the Texas coast, and also 

 southward along the Mexican coast to the neighborhood of 

 Tampico, I have recently designated 1 as the Tamaulipan Fauna. 

 Among the birds that extend northward from the tropics to find 

 here about their northern limit are the following: — 



Podiceps dominicus 

 Ortalis vetula maccalli 

 Engyptila albifrons 

 Buteo albicaudatus 

 Crotophaga sulcirostris 

 Trogon ambiguus 

 Nyctidromus albicollis merrilli 

 Amazilia fuscicaudata 

 Amazilia cerviniventris 

 Pitangus derbianus 



Myiozetetes texensis 

 Xanthoura luxuosa 

 Embernagra rufivirgata 

 Sporophila morelleti sharpei 

 Euphonia elegantissima 

 Vireo flavoviridis 

 Compsothlypis nigrilora 

 Geothlypis poliocephala palpebralis 

 Basileuterus culicivorus 

 Harporhynchus longir. sennetti 



The Tamaulipan Fauna has fewer distinctively tropical types 

 than would be expected from its low altitude and geographical 

 position. This is doubtless due to the extreme aridity of the 

 country, since in the forest regions further inland under the same 

 parallels Trogons, Motmots and Parrots occur to a much greater 

 extent than in the arid, nearly treeless coast region. 



The extreme southern portion of Lower California, from about 

 La Paz southward, may be considered as fairly subtropical, but 

 contains, on the whole, comparatively few distinctively tropical 

 types of birds. Among such may perhaps be placed the 

 following: : — 



1 Bull. Am. Mus. Nat. Hist. IV, p. 241, Dec. 1892. 



