I study hummingbirds at the Rocky Mountain Biological Laboratory, at 9,500 feet in Colorado. This is a male Broadtailed Hummingbird, known for the whistling/trilling noise they make when they fly. You can see the gap between the first two primary feathers (the longest ones) on this bird's wing, which is what makes the mechanical noise when they fly. These birds overwinter in Mexico, breed in the Rocky Mountains. The early larkspur is one of the first wildflowers to bloom after the birds arrive, and they drink nectar from the flowers and pollinate them. Photographed with a Nikon D800e, Nikon 70-200mm lens at 155mm. ISO 1250, 1/250 sec, f20. I think I had my Nikon R1 flash on, which would have created the dual lights reflected in the bird's eye.