. La répartition de la vie des oiseaux en Colombie; une contribution à une étude biologique de l'Amérique du Sud . Hat du point de vue des zoologistes, les déclarations évéenengeneralisées sont de valeur. Les forêts de la zone tropicale.— la zone tropicale possède cinq zones largeaires de forêt lourde et humide. Nommés par ordre d'importance theyare (1) l'Amazonie; (2), la côte du Pacifique; (3), la partie inférieure de Cauca-Mag-dalena; (4) le bassin de Maracaibo, dont seulement la partie occidentale se trouve en Colombie, et (5) le Santa Martan. La région forestière amazonienne occupe toute cette partie de la Colombie à l'est des Andes et au sud
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. The distribution of bird-life in Colombia; a contribution to a biological survey of South America . hat from the zoologists point of view, evengeneralized statements are of value. The Forests of the Tropical Zone.— The Tropical Zone possesses five largeareas of heavy, humid forest. Named in order of their importance theyare (1) the Amazonian; (2), the Pacific coast; (3), the lower Cauca-Mag-dalena; (4) the Maracaibo Basin, only the western portion of which entersColombia, and (5) the Santa Martan. The Amazonian forest region occupies all that part of Colombia lyingeast of the Andes and south of the Rio Guaviare. Its northern boundary, therefore, lies just north of the divide between Amazonian and Orinocandrainage. It forms, in fact, the northwestern corner of the vast forestsof upper Amazonia which, southward, reach to Bohvia. Miller (Expedition No. 5), writing from an elevated position nearFlorencia says one has a good view of the-Caqueta-eouHtpjv^.-perf ect oceaaof forest stretching out ahead as far as the eye can see, which, on clear days. Bull. A. M. N. H. Vol. XXXVI. Plate XXV. Mountain ForestTropicai Zone Forest I I Unforested Areas ^--■--1 Llanos DTSTKTBUTTON OF FORESTS IN rOLOMBTA 1917.] Chapman, Distribution of Bird-life in Colombia. 73 is many miles. The sight is most impressive. There is not a single risevisible and the forest is of uniform height. Dr. Hamilton Rice writing from a point west of the Sierra Chiribiquete(Lat. r 10 16; Long. 72° 12 34 and therefore slightly south of eastfrom Millers station) says: From this high land the Chiribiquete wasseen to extend southeast as far as the eye reached, the rest of the countrybeing undulating and forest-covered.... Occasionally the forest gave placeto a dense growth of bush (rastrojo), a wild tangled thicket, difficult to getthrough, on a bottom of black, boggy mud, and especially hard on thecarriers. The same writer (Z. c, p. 144) also refers to the densely forestedplains of the Inirida and Uaupes, wh
