Yesterday we saw that one of the marmosets had a hump on her back. But she disappeared into the trees too quickly - all we saw was a little ball of fur behind her neck. Today she visited our monkey feeder and grabbed a slice of banana. While she was munching on it, we had time to observe and photograph her. There wasn't one ball of fur, but two!
You can see the tail of the second one in the main blip. They are only about the size of a thumb. Don't miss the extras.