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Beware the Cow-Killer

April 20, 2008 by myrmecos

Velvet ants- which aren’t really ants at all- are wingless wasps that parasitize ground-nesting bees. They are attractive insects, bearing bright colors and cute frizzy hair. But in case you are ever tempted to pick up one of those cuddly-looking little guys, let the photo above serve as a reminder about what lies at the tail end: an unusually long, flexible stinger. As you can see, the wasp is capable of swinging it back over her shoulder, with perfect aim, to zing the forceps. The venom is potent, and in some parts of the U.S. these insects are called “Cow-Killers”. As is always the case with solitary wasps, the sting is only deployed defensively. If you don’t bother the velvet ants, they won’t bother you.

When not attacking entomologists, the wasp in the top photo (a nocturnal species in the genus Sphaeropthalma) looks like this:

Thanks to Kevin Williams for the collection, the identification, and for holding the forceps.

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Posted in Insect Links, Photography Links, Science | Tagged Mutillidae, Nature, pain, stinger, wasps | 43 Comments

43 Responses

  1. on April 21, 2008 at 5:45 pm Marvin

    And they tend to be constantly on the move … persuasive measures must usually be taken in order to photograph.


    • on August 24, 2010 at 8:43 pm billy

      i seen 1 two day florida


  2. on April 21, 2008 at 9:18 pm Beware the Cow-Killer

    […] For a picture of the velvet ant stinging over its own shoulder, check out this great post about velvet ants. […]


  3. on April 22, 2008 at 6:28 am kevin z

    But really, aren’t ants just “wingless wasps”, in the evolutionary sense?


  4. on July 28, 2008 at 2:25 am wes smith

    I SAW ONE OF THESE COW KILLERS TODAY 27 JULY 2008 IN SANFORD, NC I WAS TEPTED TO PICK IT UP BUT NOW IM GLAD I DIDNT AFTER READING ALL THESE ARTICLES ON THESE BEASTS.


  5. on July 28, 2008 at 2:26 am wes smith

    I SAW ONE OF THESE COW KILLERS TODAY 27 JULY 2008 IN SANFORD, NC I WAS TEMPTED TO PICK IT UP BUT NOW IM GLAD I DIDNT AFTER READING ALL THESE ARTICLES ON THESE BEASTS.


  6. on August 2, 2008 at 6:53 am Donna Cain

    August 2 I have just found two of these “cow killer” ants in my yard this morning! They are huge and very scarey. Is the male usually close by and aggressive?


  7. on August 2, 2008 at 6:59 pm Tommy

    I saw one of these, but much redder, at Lake Gaston today, August 2, 2008. The color was amazing and it was close to 1/2″ long.


  8. on August 17, 2008 at 10:05 am Jeff

    August 16, The wife and I have found cow killer, velvet ants in our yard. We live in Pamlico in Pamlico county. Took some research to find out what they are. Now we know not to touch them. We think we have bumble bee nests somewhere nearby.


  9. on August 17, 2008 at 12:21 pm Alicia

    My Fiance and I live in Rocky Mount and we were on our porch smoking, and we saw one of these walking across the porch. It scared me but he wanted to pick it up, im glas he didnt!


  10. on August 23, 2008 at 11:43 am Trish Ireland

    I found one on my classroom floor when I was trying to organize posters. I was on the carpet and all of the sudden it felt like my foot rolled over a prickly fern. I looked down and saw this one inch creature scurrying away from me. My pain turned from prickly, to tingly, to BURNING! It hurt but I don’t think it was comparable to killing a cow. However, it’s two days later and my foot is still burning and itchy.


  11. on September 18, 2008 at 11:59 am Amber

    I found one of these today (8/18/08) in my driveway (Jacksonville, NC)… totally freaked me out! I didn’t touch it cause it looked potentially dangerous but I tried stepping on it to kill it. That bug is tough! I stepped on her like 10 times and she wouldn’t die! I didn’t know what it was so I sprayed every kind of insect killer I had on her LOL


  12. on October 26, 2008 at 11:05 am Trevor Wilson

    The males have wings and cannot sting. They are found more common in the hot summer months.


  13. on November 20, 2008 at 4:36 pm brianna

    Cow killers are mean and hairy . They make us sick alot.I hate cowkillers


  14. on March 12, 2009 at 2:24 pm Jayden

    Man, These things freak me out, one day i picked one up with tweezers and it was like an inch and a half long…..i’m talking about the stinger OMG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


  15. on July 20, 2009 at 3:40 pm Dennis

    You people that claim this “Cow Killer” in the male sex does not have a stinger are 100% wrong, they sure do have a stinger, the same length or almost the same length as it’s much more colorful female partner.


    • on July 27, 2009 at 1:55 pm Heid

      A very large, bright red one was spotted while cutting the grass today. Eastern VA. Never seen one before, very interesting reading about them now. Hope they go away.


    • on August 26, 2009 at 11:03 am C.M. Wilson

      Dennis,

      Males do not have a stinger in any wasp, bee, or ant. The stinger is a modified organ called the ovipositor wich onlly the females have.


    • on April 21, 2011 at 2:58 pm fred

      The males of any wasp or bee does not have a stinger. The stinger is only on females. it’s a modifies oviposter. Better do a little more reading my friend or actually handle a male like I have.


  16. on August 4, 2009 at 1:02 pm Shauna

    August 4, 2009 saw one on the side of the house. Did not do anything cause I figured I would just knock it off. About 10 minutes later it was on the other side of the house by the car when I went to leave. My 5 year old was scared to death, cause I tried stepping on it several times and it was still moving. I had flip flops on and I could feel how hard it’s body was trying to squish it. I didn’t get it squished but looked for it when I got back. It was laying on it’s back with it’s legs in the air. I assume that it had enough damage to it finally to die. They are pretty but at the same time they are scary….This was in Dunn NC.


  17. on August 9, 2009 at 2:25 pm lycidas

    I first ran into one of these things at Fort Benning Georgia, while in basic training.

    Literally took me 10 minutes to kill it, i was too afraid to stop trying after the first few boot stomps.

    It screams, it’s tough, and it’s the only time my DI was nice to me. “If that thing gets you soldier, I’m gonna laugh my ass off”

    Since I live in Georgia, it’s at the top of my watch out for list. I take every opportunity to educate those around NOT to screw with this bug.


  18. on August 10, 2009 at 12:07 pm James R. M.

    Growing up in rural country of central Florida, I spent much of my boyhood barefooted. I shall never forget the stings of a “cow killer ant”. Simply excruciating. I’ve been stung maybe 4 times in my life and each time I thought it would probably be better to just die. It’s much more intense than the common wasp sting. Today I found one in my back yard, (central Georgia) and I gave her the respect she taught me as a youth. She is now in a glass jar awaiting judgment and sentencing.


  19. on August 12, 2009 at 5:21 am No Name

    I saw two of these freakin scary bugs just a few weeks back (mid July) while walking my dog in my neighborhood north of Atlanta. The first one I came across was on my front porch and scared me to death. It must have been over an inch long. Luckly I had enough sense to realise killing it with flipflops wasn’t a smart idea. The next day, further on down the street, I came across another one. It was about the same size as the first, and like the first, I decided not the squish it. However, my younger sister was with me, so I used a stick to pick it up to show her. This cow killer made a very similar pose as the bug in the first picture, and at the sight of the stinger I dropped the bug and ran off. I read they only come out in hot summer weather, and since the temperature has gone down, I haven’t seen another.


    • on September 12, 2009 at 7:48 pm SOME BODY

      AWWWWWWWWWW NOOB U STUPIED\


  20. on August 16, 2009 at 1:01 pm Lori

    I was visiting my father in Texas. My family and I went on a walk in the forest. We found 2 and collected them . Not knowing what they were. We picked them up with nets and brought them back to put in a tank full of toads the kids caught the day earlier. The next day we had found all the toads had died. The two cow killers were the only ones that were living. We found out what thery were that day. Needless to say, we smached them.


  21. on August 30, 2009 at 10:03 am andy

    I found a cow killer on my front porch, and promptly caught it in a nearby glass, with a tupper ware bowl for a lid. I then woke up my wife to come see the big game I had trapped. When I described the beast to her she knew it was a “cow killer” I had never heard of such a thing. She told me that they are ants, and don’t sting… “I think” I promptly released it into my neighbors yard. Fort Mill, SC.


  22. on September 8, 2009 at 10:41 pm jenkm0

    We just moved to North Little Rock, AR. We were getting in the car when my 3 year old son said look at this ladybug. I looked at it and said I don’t think that is a ladybug. I thought it was pretty. We went on to my other son’s football practice and I asked a parent what this insect was. They all replied together,”DON’T TOUCH IT”. One parent said she knew it by cow killer but didn’t know the proper name. I came home and looked up more info. I’m glad my son didn’t touch it.


    • on September 12, 2009 at 7:49 pm SOME BODY

      YEAH WELL I GOT STUNG BY ONE AND U WOULD RATHER BE SHOUT BY A FREAKEN SHOT GUN IN THE HEAD!


  23. on September 14, 2009 at 10:01 am Cathy

    I’m 54 years old..and have lived in Evansville, IN my whole life and this is the first year I have seen one of these……..and I’ve seen about 6 of them this summer in my yard. Are they becoming more prevalent in this area ? Wonder why ? People that I talk to say they’ve never heard of them or seen one. What’s the deal ????


    • on July 17, 2010 at 10:40 pm Anonymous

      LOL, small world! I am in Newburgh, IN and I just caught one of these “cow killers” and jumped right on to the computer to do some research about it. I actually heard it before I saw it! It was crawling on my pillow in my bed, right by my head. Needless to say, i am a bit scared to fall asleep tonight. I hope they don’t travel in packs!!


  24. on July 15, 2010 at 3:40 pm Mason

    I just moved to florida about 4 months ago and it has gotten very hot since. my little brother and I were outside today and came across a large red pretty ant like thing. We are from Minnesota and I had never seen anything like it. My Fiance works in the woods and they have all told us if it’s pretty it would probably hurt to touch it. So we smashed it repeatedly with a flip flop. We also have baby calves in the yard. Should I be worried?


    • on July 15, 2010 at 4:54 pm myrmecos

      No need to be worried. Although the sting of these insects is extraordinarily painful, velvet ants are shy insects that won’t sting unless you pick them up. Their first instinct is to run and hide.


  25. on July 20, 2010 at 8:42 am Gerry

    Thanks for the info on these things. We never heard of them, and now they are all over our brand new sod which was delivered a couple of days ago. They DO attack if you water them, it seems. How do I know this? My wife was wearing socks & running shoes while watering our new sod, and one crawled up her shoe & sock and finally her leg… with bad results. CAN YOU HELP with pest-control of these things? They will ruin your day(s), big time, and may well be enough to kill our small dog. PLEASE HELP!?


  26. on July 21, 2010 at 2:27 pm Ella

    I was j ust outside andmy family and I were raking grass. We just killed 6 of them in my backyard. Some fly. Be aware.


  27. on August 6, 2010 at 2:48 pm Stacy

    I was walking my dog on a back road on top of Lookout Mountain, Georgia, when i came across one walking across the road. I found a glass jar and put it in it. I came home and asked my son what it was and he said it was a cow ant. He saw lots of them in Statesboro, Georgia, when he went to school at GSU. I put the jar outside the house. Don’t know what to do with it.


  28. on March 25, 2011 at 3:30 pm penny steele

    When I lived in Arizona on the Colorado River there were these little what almost looked like fluff balls that the people called “cow killers”. They were alot fuzzier because you could only see their head. They came in bright yellow, orange, and white. The locals said they hurt bad if they bit you. Does anyone know what these were. I have never seen them anywhere else.


  29. on July 15, 2011 at 8:27 am Mollie

    Has anybody seen these things near or at the outerbanks NC? I Just did! Got a glass jar and caught it thinking it was an ant. The thing would’nt die when i stepped on it! I put a chunk of broken up cinder block on top, and the damn thing was still alive when i took the cinder block off an hour later! I figured lets go do some research on the internet. Now i know its a wasp.


  30. on July 17, 2011 at 10:22 pm Anonymous

    I saw a few last year and wasn’t to worried til this summer when I walked into swarms of them. Luckly I didn’t get stung but now I face a problem with trying to get rid of the creatures. I pray my children don’t step on one or worse get attacked


  31. on July 24, 2011 at 1:15 pm Linda

    I just took a picture of one myself. My cat was trying to play with it. It is a bright reddish orange. The hair looks more silky (doesn’t stick up) than the one pictured above and its abdomen is shaped like a heart.


  32. on July 26, 2011 at 12:16 pm Anonymous

    BOB BROWN IN nc

    I CAUGHT ONE OF THEM AND PUT IT IN A SEALED BAG. i KNEW THEY WERE PRETTY STRONG STINGERS, BUT MY SON WANTED ONE FOR HIS ENTOMOLOGY COLLECTION. i HAVE SEEN SEVERAL OF THESE IN MY YARD FOR THE LAST 12 YEARS. i LIVE IN sANFORD nc


  33. on July 30, 2011 at 10:14 pm Anonymous

    Fort Mill, SC. Those freakin things are all over the place here.


  34. on July 31, 2011 at 11:46 am Anonymous

    I live in Fort Mill, SC and we have seen them in our yard too. Very hard to kill.


  35. on August 1, 2011 at 6:06 am Ga. Girl

    I got stung by what I’m assuming is a baby one of these. It was only about a half an inch long and was a redish-brown color with a black stinger and black legs. I had just gotten in bed and put my arm under my pillow and…. youch …. quickly jumped up and turned on the light to find this little devil! I tried to kill it with a shoe to no avail and finally twisted the shoe ’til it ripped in two pieces. As soon as I got stung my arm got a welt on it and was oozing a clear liquid. Two days later my whole body is sore, kind of like when you have the flu or a bruise all over your body. May go to the doc. since my body hurts even when my clothing touches it.



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