mayfly nymph close up,ecdyonurus larvae

adult and animal aquatic arthropod arthropoda biofilm biology bug close closeup dragonfly dry eat electrogena entomology environment ephemeroptera european fish fishing fly flyfishing form freshwater habitat heptagenia heptageniidae heptagenoidea imago insect insecta insects invertebrate larvae leaf life live macro macroinvertebrate mayflies mayfly minnow nature not nymph only organism photography river scraping shadflies short spring springtime stageecdyonurus thalerosphyrus this underwater upecdyonurus very wild wildlife wing wings zoology