Currently viewing the category: "Water Beetles"
What's That Bug? does not endorse extermination

Subject:  Freshwater bug
Geographic location of the bug:  East Kootenay, British Columbia
Date: 06/03/2019
Time: 10:44 PM EDT
Your letter to the bugman:  Found this insect floating in a freshwater lake in late May.
6 legs, approximately 2” long.
Found another smaller specimen the next day.
Suspect type of dragon fly larva but never seen one with these mouth appendages
How you want your letter signed:  David

Water Tiger

Dear David,
This is a Water Tiger, the predatory larva of a Predaceous Diving Beetle.  It breathes air through a siphon at the tip of its abdomen which is why you found it floating.  Here is a BugGuide image for comparison.

Water Tiger

What's That Bug? does not endorse extermination

Subject:  Pool creature?
Geographic location of the bug:  Tennessee
Date: 05/12/2019
Time: 08:17 PM EDT
Your letter to the bugman:  My sister had me come look at her pool over these things eating the tadpole eggs in the filter.
How you want your letter signed:  Kitty

Water Tiger

Dear Kitty,
This is a Water Tiger, the predatory larva of a Predaceous Diving Beetle.  These larvae breathe through a siphon at the tip of the abdomen that breaks the surface of the water.

What's That Bug? does not endorse extermination

Subject:  Elongated bug in old pool water
Geographic location of the bug:  West central Alabama
Date: 04/26/2019
Time: 07:00 PM EDT
Your letter to the bugman:  I’ve began seeing these segmented, elongated bugs for the first time this year (beginning about March, when weather got warm) in the foot of nasty pool water left in our above ground pool. They swim leisurely, but can also dart very quickly.
How you want your letter signed:  Amanda In Alabama

Water Tiger

Dear Amanda in Alabama,
This is a Water Tiger, the aquatic larva of a Predaceous Diving Beetle.  Water Tigers are efficient predators that eat small aquatic insects and invertebrates as well as small fish and tadpoles.  Here is an image from Insects of Alberta.

Water Tiger

What's That Bug? does not endorse extermination

Subject:  What kind of beetle is this?
Geographic location of the bug:  Tri-state area: MI, IN, OH
Date: 03/27/2019
Time: 07:18 PM EDT
Your letter to the bugman:  I found this insect dying on my deck (though the dog may have put it there). I’ve never seen one like it, much less at the end of March when very little is moving here yet. I assume it’s a beetle of some kind, but Google isn’t much help.
Thanks for answering my curiosity if you have the time! 🙂
How you want your letter signed:  Curious Gardener

Predaceous Diving Beetle

Dear Curious Gardener,
This is a Predaceous Diving Beetle in the family Dytiscidae, but we are uncertain of the species.  You may read about Predaceous Diving Beetles on BugGuide.

What's That Bug? does not endorse extermination

Subject:  What is this?
Geographic location of the bug:  Wilmington, NC
Date: 08/08/2018
Time: 01:34 AM EDT
Your letter to the bugman:  I found this in my ditch after a bunch of rainfall. We have had standing water for 2 weeks.  It has 6 legs near its head.
How you want your letter signed:  Wendy Pendill

Water Tiger

Dear Wendy,
This looks to us like a Water Tiger, the larva of a Giant Water Scavenger Beetle, which is also pictured on BugGuide.  According to BugGuide:  “Larvae often predatory.”   Here is a nice BugGuide posting.

What's That Bug? does not endorse extermination

Subject:  Strange(r) thing(s)
Geographic location of the bug:  Burgundy france
Date: 06/08/2018
Time: 01:05 PM EDT
Your letter to the bugman:  This bug had large pincers at the front, legs on his front half and moved like someone dancing the worm. It was about an inch long and very aggressive. If provoked it would curl up back on itself.
How you want your letter signed:  C. McCarthy

Water Tiger

Dear C. McCarthy
Was it found near or in water?  It looks to us like an aquatic beetle larva, commonly called a Water Tiger.

Hi Daniel,
Yes, it was near a small pond. Thanks for the quick positive identification, it helped solve a little debate with the family 🙂
Chris

What's That Bug? does not endorse extermination