Black Fly Larva

• Move by drifting downstream on silken threads that extend from the tip of the abdomen
• Often stuck by their attachment disks to the surface of rocks, sticks or other debris in the streams

• Up to 1/3 inches long
• The head is usually black, but sometimes brown, tan or green
• One very tiny leg-like appendage directly under the head
• Attachment disks (small suckers) on the end of the abdomen
• The body is segmented
• Back end of the body widens and is bulbuous
• No legs
• Tiny gills by head filter food from water

• abdomen
• appendage
• bulbuous
• larva (larvae)
• segmented