2013 Envirothon

Incomplete life cycle – 4
damselflydragonflyleechwater striderLife Cycle
Complete life cycle
mosquito:life cycle
eggs inserted into tissues of plants growing near water
damselfly:egg deposit
adult stage: after several days without feeding, climb out of water and shed skin
damselfly:adult stage
diet: zooplankton, mayflies, damselflies, any prey that can be eaten
predators:game fish, predaceous water insects
preferred habitat:still waters, ponds, lakes, streams, and rivers
damselfly:preferred habitat
movement and breathing: weak swimmers, wave abdomen side to side, closed system, spread gills, diffusion across skin
damselfly:movement and breathing
water indicator quality 2 (3 species)
damselflydragonflywater strider:Water Indicator Quality
eggs deposited on leaves/stems underwater; sometimes in shallow water
dragonfly:egg deposit
larvae/nymph stage: nymph hatches and molts 12 times
dragonfly:larvae/nymph stage
adult stage: last molt occurs with the head out of water; adult flies away
dragonfly:adult stage
diet: insects and larvae, dragonfly nymphs, worms, small crustaceans; hunts movement and will stalk prey
predators: gamegish, frogs, birds, beetles, dragonflies
preferred habitat: ponds, marshes, lake edges, shallow streams, slow moving water
dragonfly:preferred habitat
movement and breathing: climb and crawl on bottom; some burrow; can propel by sending water out their rear (rectal chamber)
dragonfly:movement and breathing
complete life cycle (1)
mosquito:life cycle
eggs deposited individually or in rafts in water or on land that will be flooded
mosquito:egg deposit
larvae/nymph stage: larvae live in water and shed 4 times (4-14 days)
mosquito:larvae/nymph stage
pupa stage: sealed cocoon fixed to an object
mosquito:pupa stage
diet: collectors-filterers: algae, bacteria, fungi, and protozoa; some feed on mosquito larvae
preferred habitat: still water
mosquito:preferred habitat
movement and breathing: both larvae and pupae swim by bending the body; siphons and resp.

horns collect air from water

mosquito:movement and breathing
eggs: ring-like cocoon around eggs on stream bottom, or carried in sac on underside of female
leech:egg deposit
larvae/nymph stage: young hatch and feed on female’s mucus
leech:larvae/nymph stage
diet: through suckers, scavenge/prey on insects, mollucks, and worms; blood suckers to fish, amphibians, reptiles and water fowl
predators: fish, predaceous water insects
preferred habitat: bottom dweller among rocks and leaves; attach to animals; prefer stagnant water
leech:preferred habitat
movement and breathing: suckers, slide, swim; open breathing system, breathe through skin; will move in waves to increase oxygen
leech:movement and breathing
water quality indicator 3 (1)
leech:water quality indicator
egg deposit: loose, underwater, attached to solid objects
water strider:egg deposit
adult stage: repeat cycle over winter
water strider:adult stage
diet: land/aquatic plants (both living and dead)
water strider:diet
predators: gamefish, predaceous water insects
water strider:predators
movement and breathing: skate on surface; spiracles (openings) on side of body; will trap air in hairs to breathe while diving
water strider:movement and breathing
egg deposit: egg cases deposited in June, carried by female
fishing spider:egg deposit
larvae/nymph stage: 1000 young hatch and are guarded by female in the nursery web
fishing spider:larvae/nymph stage
adult stage: hibernate as immature adults under stones, in trees and human structures
fishing spider:adult stage
preferred habitat: usually wooded areas, some near water, some far
fishing spider:preferred habitat
movement and breathing: walk on surface of water, more accurately a tree dweller
fishing spider:movement and breathing
diet:small fishes and aquatic insects
fishing spider:diet