This 20 inch brown trout rose for an Isonychia dry on a hot summer day while no duns were presently hatching.  Sometimes during that prolonged hatch the fish look for the duns even when they're not coming off.  This one fought so hard I expected something several inches larger, and it allowed me to take a photo post-release. From the Namekagon River in Wisconsin.
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This 20 inch brown trout rose for an Isonychia dry on a hot summer day while no duns were presently hatching. Sometimes during that prolonged hatch the fish look for the duns even when they're not coming off. This one fought so hard I expected something several inches larger, and it allowed me to take a photo post-release.

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