*Jul 01 - 00:05* Many animals have a hard time sexing in captivity, but handlers at the Bronx Zoo are happy to announce that their flock of Waldrapp ibis are getting back into the swing of things. Zookeepers have been playing recordings of the critically endangered bird’s mating calls which were recorded in the wild and so far it’s working. After seven long years with no offspring, six chicks have hatched. |NYDN|