Group IIIGroup IIIPollution-TolerantPollution-Tolerant
Benthic Benthic MacroinvertebratesMacroinvertebrates
Aquatic WormsAquatic Worms
Aquatic Aquatic earthwormsearthworms
Horsehair wormsHorsehair worms
MDC photos
Midge Fly LarvaeMidge Fly Larvae
No jointed legsNo jointed legs
Prolegs behind Prolegs behind head and end of head and end of abdomenabdomen
Very small Very small (<(<11//44”)”)
MDC photo
NABS photo
Black Fly LarvaeBlack Fly Larvae
Swollen abdomen Swollen abdomen (“fat butt”) for (“fat butt”) for attachmentattachment
Fan-like Fan-like projections on projections on head for filteringhead for filtering
Very smallVery small
MDC photo
Photo courtesy of J. Abbott – U. of Texas
Black Fly AdultBlack Fly Adult
NABS photo
LeechesLeeches
MuscularMuscular
Suction disks on Suction disks on both head and both head and end of abdomenend of abdomen
NABS photos
Pouch SnailsPouch Snails
When holding When holding the snail with the snail with the point up, the the point up, the shell opens to shell opens to the the leftleft
MDC photo
Other SnailsOther Snails
Has no spiral Has no spiral pointpoint
Flat/pond snailsFlat/pond snails
Thank you!Thank you!
"I fish because I love to, because I live the environs where trout are found, which
are invariably beautiful.” - Robert Travers