Green with dampness. Red is the most active color, blue the most passive; green, in the middle, is the color of neutrality and calm, sometimes used in architecture and design for these reasons. Blue and green together symbolize harmony and balance. Green is often associated with jealousy and envy. The expression "green-eyed monster" was first used by William Shakespeare in Othello: "it is the green-eyed monster which doth mock the meat it feeds on." Shakespeare also used it in the Merchant of Venice, speaking of "green-eyed jealousy." Green today is not commonly associated in Europe and the United States with love
Green-eyed tree frog rejected by female green-eyed tree frogs from the south. Their geographic separation has caused a change in mating calls, that continues to drive the two types of green-eyed tree frogs apart. If and when the females from the southern region decide to mate with the males from the north, they are re-productively disadvantaged. Their crossbreed offspring don't survive as long as the frogs whose parents breed with other frogs from the same region. Scientists now use the green-eyed tree frog in their studies of speciation and evolution due to the mating habits of the frogs in Australia. When it comes