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

Subject:  Crazy looking flying something
Geographic location of the bug:  Bellingham washington
Date: 10/24/2017
Time: 12:33 PM EDT
Good day,
I was outside just as it was getting dark and I heard a weird bug flying around. Well it was a big something and then I notice a few more over by the house. It’s fall time here and nights get down to the 40’s.
I am sending a phone I took please feel free to use it.
How you want your letter signed:  TJA

Predaceous Diving Beetles

Dear TJA,
These are Predaceous Diving Beetles in the family Dytiscidae, but it is going to take someone with more expertise in the family to provide you with a species identification.  Though they are primarily aquatic, as you observed, they are capable of flight.  According to BugGuide:  “Adults with long hairs on hind tibiae and other modifications for swimming; move their hind legs together like oars, like Backswimmers do.”

What's That Bug? does not endorse extermination

Subject:  Found bug never seen before
Geographic location of the bug:  North Dakota…
Date: 09/10/2017
Time: 10:47 PM EDT
Could you help us identify this couldn’t be found anywhere on internet.
How you want your letter signed:  Rhonda Delzer

Remains of a Predaceous Diving Beetle

Dear Rhonda,
You have discovered the remains of a Predaceous Diving Beetle in the family Dytiscidae, possibly a Harris’s Diving Beetle,
Dytiscus harrisii, which we found pictured on BugGuide.  A bird or other predator has eaten the soft, nutritious abdomen and left the harder, less edible parts like the head, thorax and elytra for you to find.

What's That Bug? does not endorse extermination

Subject: New Jersey leech like insect
Location: Gloucester County New Jersey, USA
August 2, 2017 8:17 pm
I have standing water on my property that is there from rain, not spring feed, today while looking at the water, I noticed these flat brownish insects in the water, I don’t remember seeing these bugs before, I thought they might be leeches but every picture I googled of leeches showed them being black. Also these bugs have pitchers, please help, thank you,
Signature: D. Clement

Water Tiger and Tadpoles

Dear D. Clement,
This appears to be a predatory larva of an aquatic beetle, commonly called a Water Tiger.  It is surrounded by Tadpoles, and they are most likely its prey.

What's That Bug? does not endorse extermination

Subject: what is this?
Location: Preston county West virginia
June 30, 2017 5:29 pm
I found this while cleaning my pool. Could you please tell me what it is. The pool was drained to clean leaves at the bottom left from the fall.
Signature: not in my pool

Aquatic Beetle Larva

The best we can do is identify this as the aquatic larva of a Water Beetle.

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Subject: Large Army Green Beetle
Location: Terlingua Ranch, West Texas
May 5, 2017 2:37 pm
We found this guy on top of our water catchment barrel in West Texas, next to Big Bend National Park. He was big enough to fit in a teaspoon, which I used to get him out. He sprang off the spoon with those powerful back legs. He didn’t attempt to fly, but it looks as if it has wings of some sort under that hard exterior. I am certainly curious about this one. We see so many unique insects out there, but this one is a mystery. I love his little eyes….
Yes, I did take this photo and you can use it if you would like.
Thank you for any info you could give.
Signature: Jo

Giant Diving Beetle

Dear Jo,
This is a Predaceous Diving Beetle in the genus Dytiscus, and it is an aquatic species that can also fly from one watery environment to another, so finding it on the water catchment barrel makes perfect sense.  At first we thought it must be the Giant Green Water Beetle,
Dytiscus marginicollis, but that species is only reported from the far west, and according to BugGuide:  “posterior yellow band of pronotum broad especially in the middle” and your individual is lacking that band.  Based on this BugGuide image, we now suspect it might be Dytiscus carolinus, though other images of the species show strong grooves in the elytra.  It is described on BugGuide as being “Abdominal sterna colouration reddish to black and elytra with no yellow subapical transverse fascia.”  But for the coloration, that description does fit.  This FlickR image also resembles your individual.  So though we cannot commit to a species, we are confident that this is a Predaceous Diving Beetle in the genus Dytiscus.  Perhaps mardikavana who frequently writes in with identifications might be able to provide a species identification, however we have a previous comment from mardikavana that states:  “I can’t definitely ID it because when you are dealing with dytiscus sp. you need to see the underside as well. “

Correction:  May 14, 2017
Thanks to a comment from Zach Bruder, we learned this is a Giant Diving Beetle,
Cybister fimbriolatus, and according to BugGuide:  “Similar to Dytiscus, but metatarsal claws different. Elytra and pronotum smooth in male. Dilated male protarsus differs in details from that of Dytiscus. Female Cybister has fine furrows on pronotum.”  Here is a BugGuide image of a greenish individual.

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Subject: big black thing
Location: Belgrade, Serbia
March 22, 2017 7:47 am
This just fell from the sky with a loud thump and doesn’t move. I’m 46 and I’ve never seen one.
Signature: Milan Maksimovic

Predaceous Diving Beetle

Dear Milan,
Though this is an aquatic predator, the Predaceous Diving Beetles in the genus
Dysticus, and we believe your individual is in the genus Dysticus, are capable of flying from pond to pond in the event the original pond begins to evaporate.  Here is a BugGuide image for comparison.

Thanks Daniel!
This was far from any still or flowing water, by at least 3-4 miles. It’s possible that some bird picked it up and dropped it since it fell in a straight line from the sky.
Thanks again.

Yes, that is possible.

What's That Bug? does not endorse extermination