DirkWill wrote:
If there was another crane that didn't make it in the image, I'd guess the "juggling" would be a stick or piece of something from the ground that the crane throws up in the air, sometimes repeatedly. It's part of their mating dance. I like to think of it as uncontrollable exuberance...
Yes, the slightly larger Crane in the pair was off to the right of this image. These two were definitely starting to dance, so I think you are right; it’s just a small piece of reed or stick that she chose to juggle with.