Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
I shot a picture every twenty seconds for a few hours as the sunlight faded over the Alaska Range above Black Rapids, and compressed them into this time lapse. It's amazing how much the mountains directly affect the clouds, and I never really appreciated it until I saw them in motion like this.