Batty Aurora

Foraging bats during aurora

This morning's geomagnetic storm was just a dull green arc until about 2 a.m., then colors and shimmering ramped up for about an hour. Meanwhile, I was entranced by the sound of wing beats from 10-20 bats foraging over the water close to me. These images are a combination of several frames of long exposures for the aurora with a flash pop for the bats at the beginning of each exposure. A calm night at Island Lake in northwestern Montana.