Other clutches of the frogs have suffered a lethal skin fungus, known as chytridiomycosis, that has wiped out other amphibian populations in Central and South America, researchers said.

• 研究人员说，油彩蛙之所以会被认为已经灭绝，是因为它们曾受到了一种致命的真菌性疾病的袭击。