Tree Frog The American Museum of Natural History replica of the stained glass. The ancestors of modern frogs have inhabited the earth for 190 million years. Their uncanny ability to adjust to changing conditions in the environment has made them a symbol of survival and perseverance worldwide. These dazzling hues have been painstakingly reproduced by the artisans, drawing from their extensive research of ancient stained glass techniques in order to faithfully represent every shade and tint. When a natural light animates this stained glass, the Tree Frog reflects the capricious brilliance of nature and diversity of life in the rainforest.