Tropical Ecology and Conservation [Monteverde Institute]



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Publication Date

September 1999


I studied feeding preferences of hummingbirds in the presence and absence of a simulated predator at feeders with varied nectar concentration. Using nectar concentration of 15% and 25% with and without predators, I counted visits over eleven sessions of one hour apiece. I found no significant patterns in number of visits (p= .379) or number of species visiting (p= 0.413) across all treatments. The hummingbirds showed no avoidance of the predator nor preference for nectar concentration. Although no statistically significant patterns were found, these findings are biologically relevant because they indicate possible behavioral responses to fragmentation and environmental disturbances.


Estudie las preferencias alimenticias de colibríes en la presencia y ausencia de un depredador en comederos con concentración de azúcar diferentes. Use concentraciones de 15% y 25% con y sin depredadores. Conté las visitas en 11 periodos de una hora. No encontré muestras significas en el número de visitas (p= 0.379) o en el número de especies diferentes que visitaron (p= 0.413) para todas las pruebas. Los colibríes no mostraron comportamiento de evitar el depredador o una preferencia para una concentración de azúcar. Aunque no se encontraron patrones significativos, estos resultados son importantes biológicamente porque indican repuestas de conductas posibles a un ambiente fragmentado y con alteraciones.


9 pages

Holding Location

Monteverde Institute


English; Spanish

Media Type



Digital Only





Nectar preference and predator avoidance of hummingbirds, September 1999



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