I was minding my own business, head in a tree as often happens, when one of these crazy little dudes flew into me today. Maybe it thought I was a trunk. It rolled a couple of times in mid air, tumbled, then recovered in time to land on a nettle, scrabbled about, righted itself, then turned and gave me the most indignant look, as if its crazy flying was all my fault. These are Red-headed cardinal beetles (Pyrochroa serraticornis), frequenters of shady woodlands, predators on other insects, occasional menaces of the airways.