Great spangled fritillary (Speyeria cybele) on a backpack strap
![Image: Great spangled fritillary (Speyeria cybele) on a backpack strap](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/Animals_Insects_00034.jpg?itok=53InKuQ1)
Detailed Description
An adult great spangled fritillary butterfly rests on the strap of a backpack left in the sun at a field research station. It may have been attracted to the radiant heat or salts left behind on the strap in human sweat.
Sources/Usage
Public Domain.