This heavy duty laminated double sided card shows the most common aquatic macroinvertebrates, crustaceans, mollusks, and worms. It is a quick method of identifying them while fishing or in the field.
It has four sections of identification-
Insect Larvae and Nymphs: Damselfly, Netspinner Caddi's fly, Riffle Beetle, Midge Fly, Dragonfly, Caddis Fly, Watersnipe Fly, Black Fly, Dobson Fly, Water Penny, May Fly, Stone Fly, and Crane Fly.
Crusteaceans: Scud, Sowbug, and Crayfish
Mollusks: Gilled snail, Lunged snail, Clam and Mussel
Worms: Planarian, Leech, and Aquatic Worm
The card has pictures of the different larvae and species with measurements, with a 2" scale as well. It comes with a small hole in one corner so that you can put it with others on a jump ring or bead key chain. The size is 3 7/8" x 2 1/2".