Cached food is sometimes used to feed nestlings and fledglings. Predation is a common source of mortality, typically also occurring with eggs, nestlings and fledglings. Fully grown fledglings in tree nests are probably invulnerable to predation. Golden eagles have killed some young whooping cranes and fledglings. The fledglings are able to fly short distances after leaving the nest. In central Europe, the mean number of fledglings per nest averages between 1.8 and 1.9. The sexes are alike and fledglings resembled adults. In East Thrace, Turkey, the breeding success was estimated at 1.01 fledglings per pair. Sexual dimorphism is apparent in European fledglings, as females often scale about against in males. She finds out that Heath is being held captive by "undead" fledglings. The excreta of the fledglings also pose a problem. About 31.5% of fledglings survive. Then, he taught the fledglings to fly and to hunt. Born in Bury, Greater Manchester, Neville, along with brother Gary, was one of "Fergie's Fledglings". In Austria, the average number of fledglings per successful pair was 1.63.