Labium (“lower lip”)
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Labium (“lower lip”). Labrum (“upper lip”). Mandible. Maxilla. Palp. Antenna. Pronotum (“back”) Prosternum (“belly”). Mesanotum (“back”) Mesasternum (“belly”). Femur. Tibia. Metanotum (“back”) Metasternum (“belly”). Tarsus. Cerci. Damselfly nymph.

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Labium (“lower lip”)

Labrum (“upper lip”)

Mandible

Maxilla

Palp

Antenna

Pronotum (“back”)

Prosternum (“belly”)

Mesanotum (“back”)

Mesasternum (“belly”)

Femur

Tibia

Metanotum (“back”)

Metasternum (“belly”)

Tarsus

Cerci


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Damselfly

nymph

Odonata (damsel and dragonfly) nymph characteristics

3 Anal lobes or points

Lower lip is a scoop-like structure longer than head

No visible gills

6 legs


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Dragonfly nymph


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Ephemeroptera (mayfly) nymph characteristics:

6 legs

2 or 3 cerci

Gills on abdomen


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Gills on abdomen


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Tusks


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Adult Ephemeroptera


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Mayfly swarm


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Plecoptera (stonefly) nymph characteristics

Six legs

2 cerci

Gills on thorax - none on abdomen


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Adult stonefly

Plecoptera means “hinged wings”


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Trichoptera (caddisfly) larvae characteristics

6 legs

Often cased (not always)

VERY small antennae

Gills on abdomen


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Cased caddis - after being taken out of it’s case


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Hydropsychidae (case-less caddisflies)


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Trichoptera pupae


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Coleoptera (beetle) characteristics

Adults:

hardened outer wings

Relatively long hind legs

Larvae:

Hardened head capsules

6 legs

Elongated abdomens


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Dytiscidae

(predaceous diving beetles)


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Diptera larvae (flies) characteristics

No legs - worm-like

At least some part of the head capsule is hardened


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Chironomidae (Non-biting midges)

in Order Diptera (flies)


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Adult Chironomid


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Simulidae (black fly)


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Hemimetabolous

Nymph

Adult


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larvae

pupae

adult

Holometabolous


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