A poke around the house while doing some yard work found a few tasty morsels for those fish. Ever since they redid the highway upstream, I've noticed an increase in abundance and diversity of emergent macroinvertebrate life. Proof that installing storm water retention systems for impervious surface runoff does make a difference. The bonus? I've finally started observing a few species of mayflies over the past year that are only found in clean coldwater environments. While the Pelican River that runs through my backyard isn't what you'd classify a trout stream, it does support the same macroinvertebrate life that you'd expect in a blue ribbon trout stream.