As I cooled my trail-weary feet in a Colorado mountain stream, I noticed a small creature flitting above the water about tree top height. A glut of recently hatched gnats no doubt inspired the critter’s erratic hover.  The flier was bat-sized, a little small for a bird, and its flight was bat-like as well.  Yet the evening seemed too early for bats.  I watched for several minutes trying to distinguish bat or bird and finally got the right angle to see that the head was bird-like. Shortly after that, as I sat beside our camper, something flew just over my head and apparently clung briefly to the side […]