I'd been chasing Snowy owls for ~5 months. It is difficult to get a unique photo of these birds. She was resting on a log. I had been observing her for about 15 minutes when all of a sudden she jumped straight up into the air. It startled me but I snapped a quick photo and then turned around, rather irritated, to see who had walked up behind me and scared the bird, but no one was there? Finally, I saw that two black bumble bees had buzzed her. That scared her and caused her to hover in the air.