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.
How many species of frogs have little protection from predators, tree frogs have adapted green coloration on their back. Like the red-eyed tree frog, during the day it lies dormant, hiding their amazing bright colors beneath his feet. Closes her eyes are bright red with green shaded eyelids, so he did not see.