The first naturally fluorescent frog was discovered recently in Argentina － almost by chance, a member of the team of researchers said.
Argentine and Brazilian scientists at the Bernardino Rivadaiva Natural Sciences Museum made the discovery while studying the metabolic origin of pigments in a tree-frog species common to South America.
Under normal light the frog’s translucent skin is a muted yellowish-brown color with red dots, but when the scientists shone an ultraviolet light on it, it turned a celestial green. According to one of them, Carlos Taboada, the case is "the first scientific record of a fluorescent frog."
"We were very excited," said his fellow researcher Julian Faivovich. "It was quite disconcerting." He said the discovery "radically modifies what is known about fluorescence in terrestrial environments."
The team studied some 200 more examples to ensure the phenomenon was not due to the frog’s captivity, and detected the fluorescent properties in all the specimens.
Maria Lagorio － an independent researcher and expert in fluorescence － said that the trait is common in aquatic species and seen in some insects, "but has never been scientifically reported in amphibians." The finding was recently published in Proceedings of the National Academy of Sciences.
fluorescent：螢光的、容光煥發的。例如：a fluorescent youth.（容光煥發的青年。）
muted：柔和的、溫和的。例句：On the whole, criticism was muted.（整體而言，批評算是溫和的。）
disconcerting：令人困惑或不安的。例句：She tried to break the disconcerting silence.（她試圖打破這令人不安的沉默。）