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.
However, in the adult state, they feed on a range of insects and other small invertebrates. Their diet includes ants, beetles, crickets, flies, moths and worms. In the wild, green tree frogs are part of the diet of other animals, such as birds, reptiles and carnivorous mammals. While the frogs are usually bright green, they can change their color according to their environment, temperature and mood.