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Costa Rica_rana arbórea calzonuda o red eyed frog | by MayteVidri (busy / ocupada)
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Costa Rica_rana arbórea calzonuda o red eyed frog

La rana verde de ojos rojos (Agalychnis callidryas) es una especie de anfibio anuro de la familia de Hylidae.

Lo más notable son sus grandes ojos rojos con pupila vertical. Como adultos llegan a tener colores brillantes sobre todo su cuerpo. Predomina el verde pero usualmente presentan otros colores como azul o amarillo. Las patas delanteras presentan un azul brillante, mientras que las traseras son rojas o anaranjadas. La coloración de esta rana es muy llamativa. El macho es más pequeño que la hembra: 560 mm y la hembra 710 mm. Son de hábitos nocturnos y arborícolas

La rana calzonuda habita desde el sur de México hasta el norte de Colombia.

Prefieren tierras bajas húmedas de los bosques lluviosos, en áreas cercanas a cuerpos de agua.

 

Se han descubierto incompatibilidades genéticas entre individuos de diferentes regiones geográficas dentro del mismo país de origen, por lo que pese a su gran parecido morfológico se empieza a dudar de que todas pertenezcan a la misma especie.

 

Las ranas arborícolas depositan los huevos en la vegetación que cuelga encima del agua. Es un comportamiento reproductivo curioso y cuando llega el momento de la eclosión, la cubierta de los huevos se va deshaciendo y los renacuajos resbalan por la hoja y caen al agua donde llevan una vida como cualquier larva de anuro.

Comen cualquier presa viva que les quepa por la boca: grillos, polillas, mariposas, saltamontes, moscas, etc.

Tiene variedad de depredadores, entre ellos: aves, murciélagos y serpientes. Su piel contiene toxinas pero no son tan poderosas.

Esta especie no esta considerada como especie en peligro; sin embargo, el estado de su hábitat es preocupante. El calentamiento global, la contaminación, la deforestación y los cambios atmosféricos han provocado serios daños en los bosques. Conforme disminuye el bosque disminuyen sus especies, entre ellas las ranas, ya que son mucho más sensibles que otras poblaciones. Esto las hace buenas indicadoras ambientales.

es.wikipedia.org/wiki/Agalychnis_callidryas

 

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The Red-eyed Tree Frog (Agalychnis callidryas) is an arboreal hylid native to Neotropical rainforests in Central America.

The Red-eyed Tree Frog is a small-sized tree frog, reaching lengths of about 5 - 7 centimeters (3 inches). Its dorsal surface is green of varying shades, and its ventral surface is white. The sides of the frog are purple or blue, with vertical white stripes and orange toes. Young frogs are typically brown in color and turn greener as they mature, although adult frogs can change their color depending on mood and environment.[1] Both females and males have bulging orangy red eyes with vertically narrowed pupils, resembling the eyes of domestic cats. Red-eyed tree frogs have soft, fragile skin on their belly, and the skin on their back is thicker and rougher. Males are generally somewhat smaller than the females.

 

Bright markings along the sides and limbs reduces predation. Most animals that prey on A. callidryas (some bats, snakes, and birds) often rely on their vision. When the frog moves to avoid the predator the bright colorations flash into view (hence their name, flash colors) and throw off the predator. This is achieved by leaving a ghost image in the visual field of where the frog was originally. This confuses the predator and gives the frog time to hide. These flash colors may also deceive predators by making the frog appear poisonous.

Red-eyed tree frogs are not poisonous and rely on camouflage to protect them. During the day, they remain motionless, cover their blue sides with their back legs, tuck their bright feet under their belly, and shut their red eyes. Thus, they appear almost completely green, and well hidden among the foliage. Their eyes seem to glow in the dark.

Red-eyed tree frogs are mainly carnivores. They prefer crickets, flies, grasshoppers and moths. Sometimes, they will eat smaller frogs. For froglets, fruit flies and pinhead crickets are the meals of choice.

During the mating season, when rainfall is at it highest, males of the red-eyed tree frog form choral groups to entice females to small water pools where their eggs are then laid and fertilized by a chosen male. The males do this by climbing onto the backs of the females and rubbing their hind limbs along her rear flanks of the female. The eggs develop into larvae and later into small tadpoles. After full metamorphosis weeks later, the juveniles that survive the first few weeks crawl back into the undergrowth and security of plants in the vicinity of these pools, often in the hollows of tubular plants like bromelias.

Red-eyed tree frogs inhabit rainforests from southern Mexico, through Central America, to Northern Colombia.

en.wikipedia.org/wiki/Agalychnis_callidryas

 

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Taken on January 1, 2006