a speckled dun genus callibaetis mayfly in colorado

entomologist midge resting unique wandering aquatic insects arthropod biodiversity biological study callibaetis colorado delicate details ecological ecology ecosystem entomology environment fauna field habitat insect behavior identification life cycle mayfly midday minuscule natural history world nature observation observations onlookers outdoor park patterns peaceful rocky terrain scientific research seasonal serene small creatures species speckled duns surface warm light wildlife dun genus perched textured