U.S. News has named a member of the Ivy League as the best national university in each of the past fifteen years ending with the 2015 rankings: Princeton eight times, Harvard twice and the two schools tied for first five times.
Frogs tend to be nocturnal because night is the best time for them to catch prey such as insects and worms. Nocturnal terrestrial frogs are often brown or gray with spotted backs, while nocturnal tree frogs are usually green. These camouflage colors keep them hidden from predators as they sleep during the day.
The Red-Eyed Tree Frog helps prevent over-population of its prey such as insects and small frogs. It also serves as a âmascotâ for many conservation agencies such as âSave the Rainforestâ since its habitat is diminishing.hey are a mainly arboreal amphibian which means that they are âtree dwellingâ frogs. However, as tadpoles, they are found in the water and only with age do they migrate to the trees. They are a nocturnal amphibian and sleep during the day.