Costa Rica lies squarely in the tropics, at a crossroads connecting North and South America. This "rich coast" country, is bordered to the east by the warm Caribbean, and the Atlantic Ocean, and to the west by the Pacific Ocean. In between these coasts, lie lowland jungles, mountain forest draped in mosses, alpine tundra, and dry forest--and all adorned with anurans (frogs and toads that is). The fact that so many frogs are nocturnal—photo has been taken when it was pitch-dark with the use of flashlight!! It was very, very warm and humid ( with100 % humidity) because it was raining a bit and …………… mosquitoes !!! Red eye tree or leaf frog (Agalychnis callidryas). Costa Rica. Red-eyed tree frogs, as their name states, have bold red eyes with vertically narrowed noses, a vibrant green body with yellow and blue striped sides, and orange toes. Males range from 2 to 2½ inches (5 to 6 centimeters), while female range from 2½ to 3 inches (6 to 7.50 centimeters) on average.