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Insect Order Coleoptera (Beetles)

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Caddisflies

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Coleoptera (Beetles)

Family in Coleoptera
CurculionidaeWeevils	1	3
HydrophilidaeGiant Water Scavenger Beetles	1	2
PsephenidaeWater Pennies	3	12

28 families aren't included.

Common Name

Match	Common Name
	Beetles

Pictures Below ↓

There are about 5,000 species of aquatic beetles, and I won't be including them all on this site. I've also only included certain aquatic beetles and terrestrial (Terrestrial: Insects which live on land and are fed on by trout only when they incidentally fall into the water are known as "terrestrials" to fly anglers, and they're very important in late summer.) families which I've found frequently on trout streams.

The common terrestrial (Terrestrial: Insects which live on land and are fed on by trout only when they incidentally fall into the water are known as "terrestrials" to fly anglers, and they're very important in late summer.) forms are especially important during the late summer when they get knocked into the stream in any number of ways. As far as I know there are no specific life cycle habits which toss these insects into the water in great numbers; they just become important because there are so many of them around incidentally.

Trout generally relish beetles and their imitations make great searching patterns (Searching pattern: Any artificial fly pattern used when trout that aren't feeding selectively on anything in particular. A searching pattern may be an attractor or an imitation of something specific that the fish might favor even though it's not currently hatching.).

Pictures of 6 Beetle Specimens:

Specimen Page:12

Psephenus (Water Pennies) Beetle Larva

View 5 Pictures

Collected March 29, 2005 from Fall Creek in New York
Added to Troutnut.com by Troutnut on April 6, 2006

Hydrophilidae (Giant Water Scavenger Beetles) Beetle Adult

View 2 PicturesThis is a water beetle. It is the hardest object in the world to pick up with tweezers. The second hardest is Mount Everest.

Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Psephenus (Water Pennies) Beetle Larva

View 3 Pictures

Collected March 13, 2005 from Cascadilla Creek in New York
Added to Troutnut.com by Troutnut on April 5, 2006

Specimen Page:12

1 Streamside Picture of Beetles:

View Full Size and Comment (1.8X larger)

Many beetles of this species were jumping around the rocks like popcorn on a mid-April afternoon. I'm sure they end up in the water for the trout at times.

In this picture: Insect Order Coleoptera (Beetles).

StateNew York

LocationWest Branch of the Delaware River

Date TakenApr 16, 2005

Date AddedFeb 2, 2006

AuthorTroutnut

CameraCanon EOS 20D

Recent Discussions of Coleoptera

Family 1 Reply »

Posted by DMM on Nov 26, 2006 in the family Hydrophilidae

Last reply on Nov 29, 2006 by Troutnut

I noticed the ending of the family is reversed--should be -ae.

Your Thoughts On Coleoptera:

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Jargon Defined:

Searching patterns: Any artificial fly pattern used when trout that aren't feeding selectively on anything in particular. A searching pattern may be an attractor or an imitation of something specific that the fish might favor even though it's not currently hatching.

Terrestrial: Insects which live on land and are fed on by trout only when they incidentally fall into the water are known as "terrestrials" to fly anglers, and they're very important in late summer.

Useful References:

Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.