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

Subject: Creepy Fly Eating Bug??
Location: Backyard of home in Antelope Valley, CA
July 14, 2013 6:05 pm
This is the second day I have seen this bug and finally got a good picture! I live in the High Desert of Antelope Valley, CA. and have never seen it before. Did not realize it was eating a fly until I loaded the picture and wow…..CREEPY!
Signature: CheckingOutBugs

Robber Fly feeds upon Blow Fly

Robber Fly feeds upon Blow Fly

Dear CheckingOutBugs,
The predator is some species of Robber Fly and the appears to be a Blow Fly.

What's That Bug? does not endorse extermination

Subject: Fly with Really Large Eyes
Location: Northeast Florida
June 24, 2012 7:23 pm
Here’s another fly I saw the other day in my yard in northeast Florida. It wasn’t very big, about 10mm, but it had enormous eyes that almost took up its entire head. With its huge red eyes and bright blue-green body I thought it was colorful and interesting. I went looking for it on BugGuide and found that it’s a Chrysomya megacephala, also known as a Hairy Maggot Blowfly–not a very appealing name! I couldn’t find any flies like this one on What’s That Bug so I’m sending you a photo.
Signature: Karen in FL

Hairy Maggot Blow Fly

Hi Karen,
This is the second time this week you have provided us with a wonderful new fly species photo for our site as well as doing the necessary research to determine the species.  BugGuide does not provide any information on the species page for
Chrysomya megacephala, but if our knowledge of ancient languages is not too rusty, we believe megacephala refers to the large head in Greek and Ask.com supports that.  On the genus page on BugGuide, we learned that “Adults are robust flies metallic green in color with a distinct blue hue when viewed under bright sunlit conditions. The posterior margin of the abdominal tergites are a brilliant blue” and as an introduced species, “It is now established in Southern California, Arizona, Texas, Louisiana, and Florida. It is also found throughout Central America, Japan, India, and the remainder of the old world.”  Backing off to the family page on BugGuide for Blow Flies, the reader learns that they are “scavengers (larvae in carrion, excrement, etc.) or parasites” and that they are “very common in a wide variety of habitats, including heavily urbanized areas.”  Normally we do not link to Wikipedia, but that resource does have an extensive page on this species where it is called the even less appealing Oriental Latrine Fly.  Wikipedia also states:  “C. megacephala is considered one of the most important species of flies to forensic science. This is because it is one of the first species to show up on a corpse.”  

Hi Daniel,
I’m glad the fly photos are helpful! I learned about BugGuide from you and What’s That Bug?, and now I always try to identify the bugs I photograph by looking here and at BugGuide. Usually I can figure it out to my satisfaction. This was such a colorful fly and turned out to have such an unpleasant name! I’ve been seeing some very pretty Long-Legged Flies and I’ll try to send you some photos of those.

What's That Bug? does not endorse extermination

Monster Beetle
Location: Western Pennsylvania
July 25, 2011 1:32 pm
I found this poor drownd beetle floatig in my swimming pool yesterday and I really want to know what it is because I have never seen anything like it before. It is huge, as you can see compared to the size of the fly. I have tried searching the internet, but couldnt find very much. Please note that I did not kill this bug. I was, in fact, trying to save its little life but it was dead when I found it.
Sorry 🙁
Signature: LadyStardust

Male Broad Necked Root Borer

Dear LadyStardust,
We cannot get the picture out of our minds of you attempting CPR on this unfortunate male Broad Necked Root Borer, our Bug of the Month for July.  The antennae of the male are much more developed than those of the female.  The backyard swimming pool is one of the most deadly traps for insects and other arthropods, and you need not fear this posting getting tagged as Unnecessary Carnage.  We understand that it was accidental drowning.  It appears as though the Fly might be a Blow Fly in the genus
Lucilia, which included the Green Bottle Fly (see BugGuide).  Blow Flies are Stage One Colonizers of decomposing corpses in the increasingly popular field of forensic entomology thanks to all of the CSI style television shows (though Crossing Jordan may have set the stage for the field with “Bug” Ravi Kapoor) and high profile murder trials like that of Casey Anthony.

What's That Bug? does not endorse extermination

Fashionable fly
Location: Northeastern Louisiana
July 23, 2011 5:34 pm
Dear Bugman,
I found this cute fly in my pool skimmer in the summer of 2010. It was so cute. It’s hairy and is black with beautiful turquoise stripes on the tail section. This is the only image I have. I tried to find out what kind of fly it was searching and searching photo files, but never found it. Hope you can help.
Signature: BugBunny

Hairy Maggot Blow Fly, maybe

Hi again BugBunny,
Generally, Flies with this type of hair pattern are Tachinid Flies, and we began our search there, but we were quickly sidetracked to the Hairy Maggot Blow Fly,
Chrysomya rufifacies, on BugGuide.  We wish your photo included a view of the head as that might provided a more conclusive identification.  While we believe the identification is correct, we cannot be certain.

What's That Bug? does not endorse extermination

Large Black Flies
March 26, 2010
For the second time in about five years, we have large black flies in our house. They are not coming in from the outside and they seem to spend most of their time on our windows. In two days, I have swatted at least 50-60, so you can imagine how gross this problem is. We do have cracks where the windows meet walls-our house is on a slab, but it shifts considerably. We have not noticed any foul odors, except under the kitchen sink, but there is not a leak or sign of anything that may have died under there. We do keep rat poison in the attic, but my husband checked and found no sign of anything that died up there. I’m concerned about the health risk and have no idea, other than swatting, how to get rid of them or where they come from. Please, I hope you can help. I’d li ke to know if they bite, spread disease and how long they live, besides how to get rid of them. (I saw Amityville Horror and already told my husband that if the walls begin to bleed, I’m outta here! LOL!)Thanks-Linda
Linda Mendez
Houston Texas

Cluster Flies

Hi Linda,
It is difficult to make out any details in your images, but your description is consistent with an outbreak of Blow Flies.  Many of the Blow Flies pictured on BugGuide have metallic coloration in shades of green and blue, but others are black like your specimens.  It is possible that the poison dispatched a rat and a female Blow Fly was attracted to the rotting flesh where she laid her eggs.  We will check with Eric Eaton to see if he concurs.  If blood begins to seep from the walls, please let us know.

Cluster Fly

Eric Eaton Agrees
Daniel:
Yes, I would bet on blow flies, probably “cluster flies” in the genus Pollenia.  Cluster flies are well known for harboring between walls during the colder months, then emerging in vast numbers as described in the letter.  Still, I’d have to examine actual specimens before I could be certain.
Eric

Wow, thanks so much for the speedy reply-I’ll go to your website for answers on health and getting rid of them. Some of these do have the coloration you mentioned. I appreciate your help-Linda

What's That Bug? does not endorse extermination

Totally necessary carnage (lynx spider)
September 1, 2009
Hi! I just thought you might like to see this neat lynx spider who was devastating the fly population on my garbage can. Thanks for the site…it comes in useful for me all the time!!
Andrea
San Diego

Green Lynx eats Green Bottle Flies

Green Lynx eats Green Bottle Flies

Hi Andrea,
Your subject line caught our attention and made us cringe.  We are thrilled to see that once we opened your email, you misidentified the term carnage.  Your photo of a Green Lynx Spider feeding on Green Bottle Flies belongs in Food Chain.  Unnecessary Carnage is reserved for human instigated killing of insects and other creatures.  So often, Green Lynx Spiders, our favorite spider species, feed on pollinating insects.  It is a refreshing change to see them feeding on pestiferous species.

What's That Bug? does not endorse extermination