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Ceratophrys cornuta

8/22/2014

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Imagen
Photo credit: ©Robert Oelman
Imagen
Photo credit: ©Robert Oelman
The Surinam Horned Frog, Ceratophrys cornuta occurs in the Amazon Basin (Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru and Suriname). These frogs are voracious predators, which use a sit-and-wait feeding strategy to ambush prey that varies from ants to small vertebrates.

Horned frogs bury themselves in the leaves on the ground with only the head sticking out. Once in this position and helped by its camouflage coloration, C. cornuta waits for something edible to pass by and eats almost anything that passes, as long as it will fit in the frog’s mouth.

The cryptic coloration of these frogs is thought to be an anti-predator adaptation as it aids in camouflaging them in their surroundings. It is also thought that the horns may function as part of this camouflage, since the horns may be perceived by predators as the stem of a leaf or other such object.

Source: libutron

Ceratophrys cornuta se encuentra en la cuenca del Amazonas (Bolivia, Brasil, Colombia, Ecuador, Guyana Francesa, Guyana, Perú y Surinam). Estas ranas son depredadores voraces, que utilizan una estrategia de alimentación "sit-and-wait" -sentarse  y esperar- para emboscar presas que varían de hormigas a pequeños vertebrados. 
Las ranas cornudas se entierran en las hojas en el suelo con sólo la cabeza afuera. Una vez que esta en posición y ayudado por su coloración de camuflaje, C. cornuta espera a que algo comestible pase y posteriormente se lanza al ataque, siempre y cuando lo que pase quepa en la boca de la rana. 

La coloración críptica de estas ranas se piensa que es una adaptación anti-depredador ya que ayuda a camuflarse con sus alrededores. También se cree que los cuernos pueden funcionar como parte de este camuflaje, ya que los cuernos pueden ser percibidos por los depredadores como el tallo de una hoja u otro objeto tal.

Fuente: libutron


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