 This method of gliding is also seen in "Coelurosauravus" and the modern "Draco", neither of which are closely related to "Icarosaurus".The only known fossil skeleton which definitely belongs to "Icarosaurus" was found in 1960 in North Bergen, New Jersey by Alfred Siefker, a teenager at the time, who stumbled upon the specimen while exploring a quarry.Siefker brought the specimen to scientists at the American Museum of Natural History in New York for identification and preparation.