The Western Amazonian Boundary for Avifauna Determined by Species Distribution Patterns and Geographical and Ecological Features

Table 2

Number of forest bird species observed in Amazonian and Andean sites in Ecuador and Peru, and Sorensen Similarity Index.

Country	Amazonian site	Andean site	Shared species	Sorensen Index
Ecuador	43	42	13	0.30
Peru	45	37	6	0.15