Sara Jane Osborn had been taking pictures of a rainbow over Anchorage when something small and dark appeared in her view. A mosquito was her first thought. She looked away from the phone and realised she was seeing something farther out, above the trees. It had a dark upper shape and what looked like hanging extensions. In her description, those lower parts appeared to move separately. The rainbow had been reason enough to stop. Now she was pointing the camera at something for which she had no immediate name.