The weather was sunny and cold a week ago when I visited Flagstaff Hill so I was surprised to see over a hundred Green Darner dragonflies patrolling in the chilly breeze. They were having a picnic.
Each dragonfly faced the wind and hovered, then wheeled away to a new spot and hovered again. With binoculars I could see thousands of small insects being blown uphill in the wind. The dragonflies reached out and grabbed them. Their wings glinted orange in the sun.
Green darners migrate south in the fall so I was witnessing a "flock" that happened to stop there for an easy meal.
I don't have a video of their amazing maneuvers but this one shows how they do it.
(photo by Tim Vechter)