Native SpeciesRiffle beetle

Coleoptera (order)
FOUND by fluffysalamander26
ID Questioned
Quality checked by Mrs. Tate
Peer reviewed by
Field Notes
We went down to the streem it was cold and you could see your own breath. The water was freezing and there was bugs every where you turn. I could not catch one, they where swimming like torpedoes. Then i cought a riffle beetle but some kids found dobsonfly larva. We put all our bugs in plastic vials with water then we went to the school to studty the bugs.
Supporting Evidence
Photo of my evidence.
The riffle beetle is is 1.5 to 2 centimeters long though this specimen is smaller than the average size
Photo of my evidence.
The riffle beetle has a hard glossy shell that covers the whole body that is uniform color but with the whirligig beetle has a dark shell cover.
Photo of my evidence.
The riffle beatle has tan uniform legs and has hooks on the end. But the whirligig beetle has a darker leg but also has a hook.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Coleoptera (order)
Common name:
Riffle beetle
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 44.727210 °
W -68.627636 °
Observation Site Information
A photo of our study site.
Coastal - Beach or dune
Trip Information
Mill Streem
Trip date: 
Thu, 2014-09-04 13:45
Town or city: 
Type of investigation: 
Species Survey
Eastern Coastal
MIDAS Code: 


Nice observation here, but I think you may have found a whirligig beetle. Can you tell me why you think it's NOT a whirligig beetle and why it is a riffle beetle? The distinct head shape may lead me to believe it's a whirligig, but where did you find it? That's pretty important in determining the difference.