I happened to be walking by the Andean Condor enclosure and saw this. According to Steve, this male Condor is most likely engaging in "Thermoregulation." He's regulating his body temperature by spreading his wings out in the sun:
Caution is always a good thing when dealing with big raptors like these two Andean Condors. And despite Steve's experience, I was still nervous when I was inside their enclosure. These are some BIG Birds!
Parrot Nation 