**Caddisfly Species Rhyacophila grandis (Green Sedge)**

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Trichoptera (Caddisflies)

» Family Rhyacophilidae (Green Sedges)

» Genus Rhyacophila (Green Sedges)

» Species grandis (Green Sedge)

Common Names

Match	Common Name
	Green Sedge
	Green Rockworm
	Brown and Green Caddis

This is an especially large species of Rhyacophila, with a maximum size of 30mm.

Where & When

Region: West

Time Of Year (?): February to August

Preferred Waters: Small streams

Rhyacophila grandis Fly Fishing Tips

Gary LaFontaine notes in Caddisflies that imitataions of these larvae work well during non-hatch periods because the widely spread emergence dates mean the mature larvae are available year-round.

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Jargon Defined:

Emergence: The transformation of a nymph or pupa into the adult winged stage of an insect. The term may refer to the emergence of an individual, or the daily or yearly event in which all individuals of a species emerge.

Larvae: Many classes of aquatic insects, such as caddisflies, midges, craneflies, dobsonflies, alderflies, and many more, are known as "larvae" rather than "nymphs" in their juvenile stages. They have mostly soft bodies rather than hard exoskeletons. These insects also advance through a "pupa" stage before reaching adulthood.

Useful References:

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.