Odonata  

Common Name: Dragon and Damsel Flies.
Description: Dragon fly nymphs are short and squat, vary from olive to brown in color up to #6 Hook size. Found mainly in lakes and slow moving rivers, especially common around weed beds. Mainly nocturnal so most feeding activty from trout is after dark. Available to trout all season long.
Damsel fly nymphs are long and thin in varvaious shades of green, swim with an exagerated 'wiggle'. Up to hook size #10. Damsels are also found mainly in lakes around weed beds active both day and night.