Soaring over large distances on their immense wings, condors search by sight for the carrion upon which they feed (5). Adults in captivity begin to breed at six to eight years of age (9), and pairs mate for life (5), producing one chick every two years (10). California condors, like many New World vultures engage in an unusual behaviour known as 'urohydrosis' in order to keep cool. This involves urinating on their own legs, which takes heat away from their body through evaporation; the cooled blood is then circulated back through the body (11).