Unlike many other birds of prey, male Andean condors are considerably larger than the females. Also, males have a large caruncle (comb) and wattle which females lack. Sexes differ in eye color as well, with males having brown irises and females having red. Both sexes have the ability to change the color of the bare skin on their neck and face in association with mood. This is used for communication between individuals and males also use this for displays during mating season. This image was taken in Rocamadour, France at Le Rocher des Aigles, a raptor breeding organisation where birds are free flown.