BLACKFLY LARVA

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 -They're one half inch in length

-They have cylindrical bodies

-Widest part of the body is the back (posterior)

-They have fan-like appendages coming from their head

-They prefer cold running water

-They are usually found attached to rocks, wood, and other vegetation by the end of their abdomen

Tolerant Indicator Species  Leech  Pouch Snail  Blackfly Larva  Aquatic Worm  Lung Snail  Midge Larva