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.
Cuban tree frogs, birds, snakes, and lizards eat green tree  frogs.  The green tree frog is subject to predation by many other animals. These include most climbing snakes, â¦ cane toads, the spotted quoll (tiger quoll) and birds such as kookaburras and owls. The green tree frog has a lot of predators.uban tree frogs, birds, snakes, and lizards eat green tree  frogs.  The green tree frog is subject to predation by many other animals. These include most climbing snakes, â¦ cane toads, the spotted quoll (tiger quoll) and birds such as kookaburras and owls. The green tree frog has a lot of predators.