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By: Díaz-Valenzuela, Román - Ortiz-Pulido, RaúlType: ArticleIn: Revista mexicana de biodiversidadVolume:Series:Issue:Date: 2011-12-01Page Range:Publication Info:Subjects: bird pollinated flowers global climate change Hummingbirds ornithophylous plant species snowstorm effect sudden changes in the average state of the time