By Anne Read | 2023-09-25
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![Community photo entitled by Sheryl R Garrison on 09/23/2023 at Waterton Park, AB CA](https://earthsky.org/upl/gravity_forms/6-d184048789a60d766a02a8e43117298b/2023/09/DSC_4486-Edit.jpg)
On 09/23/2023 09:03 am by Sheryl R Garrison| Waterton Park, AB CA
The case of a caddisfly—constructed with silk and rocks from the creek bed—serves as a portable protective shelter until the larvae pupates. Recent studies have shown evidence of microplastics in some casings, but this one emerged from a mountain creek in the Rockies. Its case was constructed with argillite, limestone, dolomite, and igneous rocks.
Nikon D7200 with Nikkor 105mm
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