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Bug of the Month #2 August 2011: Bee Killing Robber Fly eats Honey Bee

Carnivorous bumble bee?
Location: Royal Oak, MI
August 2, 2011 2:15 pm
We have a honey bee hive in our yard and have been very bug friendly. We have cicada killing wasps in our driveway and we just steer clear of them instead of filling it with concrete.
Imagine my shock when I was hanging laundry out and saw one of our honey bees having the life drained out of it by what appears to be a bumble bee. Is it?
Signature: Jessica

laphria eats bee jessica 300x225 Bug of the Month #2 August 2011:  Bee Killing Robber Fly eats Honey Bee

Robber Fly eats Honey Bee

Hi Jessica,
We absolutely love your email, and we would like to wax poetically after we answer your question.  This is a Robber Fly.  It is one of two genera that both feed on large flying insects including bees and wasps that are captured on wing.  Robber Flies are amazing hunters.  They do not sting.  They will not attack you and bite you, but they might bite you if you tried to pick one up, though we could not imagine how you would ever be able to catch one.  We cannot, based on your photo, determine if this is a Bee Killer in the genus
Mallophora, or a Bee-Like Robber Fly in the genus Laphria.  One of the ways they can be distinguished from one another is the shape of the antennae.  Your specimen appears to have antennae that end in fine filaments, a sign it is a Mallophora, however, upon enlarging the photo to better examine the details, your photo is not of high enough resolution to maintain image quality.  Your individual does not have markings similar to any of the five species represented on BugGuide, which makes us wonder if it might not be a Laphria, and based on the photos posted to BugGuide, there are several species with markings similar to your individual.  They seem to all have yellow beards, and it is not possible to make out the beard on your Robber Fly, though we are not sure if the black hairs are lost in the shadow or if the tasty Honey Bee meal is obscuring the beard.

laphria eats bee jessica 2 300x224 Bug of the Month #2 August 2011:  Bee Killing Robber Fly eats Honey Bee

Robber Fly eats Honey Bee

TO BE CONTINUED …

August 3, 2011
Hi again Jessica,
We are positively enthralled by the way you set the tone for your question by providing us with your bug friendly qualifications.  We would like to take additional time to comment on your mention of Cicada Killers.  We have devoted considerable internet real estate on our site toward lobbying for the preservation of Cicada Killers, and when we receive post-mortem images of them, we tag them as unnecessary carnage, but the fact of the matter is that we have never had to share our homes and yards with them.  We really cannot claim to have experienced first hand the communal nesting habits of these large wasps.  We applaud you for your tolerance and also for inquiring about this Robber Fly.  Since we began working on this posting, we have received another unidentifiable image of a large Robber Fly feeding on a Japanese Beetle, and the person who submitted that image wants to know how to encourage more of them.  These large Robber Flies are reported to be able to consume large quantities of Honey Bees, and for that reason, they have a bad reputation among bee keepers.  Thanks again for your wonderful submission.  

Thank you so much for the information. We try not to have knee jerk reactions to what we find in the yard and as the cicada killers are nonaggressive unless you happen to be a cicada, there was no reason to destroy their habitat. It’s a short two month inconvenience of my daughters running to the door from the driveway while screaming.
As for the robber flies, they may be a bit of a bother as we are beekeepers. We have already lost one hive to varroa mites a couple of years ago and would rather not lose another one. Now that I think about it, we have spotted a few smaller species of robber flies in our yard. We have never had these insects in our yard before. Do you think the beehive may be attracting them? Is there any way to humanely deter them from eating my bees?

Hi again Jessica,
We have no advice regarding the deterring of Robber Flies.  The smaller Robber Flies are most likely not preying on your bees, and the larger Robber Flies will not enter the hive.  They will attack individual bees that are in flight.  Good Luck.

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What's That Bug? does not endorse extermination

Crab Spider eats Bee

Spider eating bee
Location: Vancouver Island BC Canada
August 1, 2011 3:34 pm
My friend in Mill Bay on Vancouver Island, BC Canada took this picture this morning on his daisies. A voracious little white spider that is enormously successful capturing and killing other insects. What is this spider’s name?
Signature: Sharon J

crab spider eats bee sharon 300x257 Crab Spider eats Bee

Crab Spider Eats Bee

Hi Sharon,
The scientific name for your spider is
Misumena vatia, and it has several common names, including Crab Spider because of its general shape, and Flower Spider because of its habit of waiting on flowers for pollinating insects.  Crab Spiders are able to change color to match their surroundings, and your white Crab Spider blends perfectly with the white petals of the blossom.

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Mystery Thing in a Date Palm

paper wasps and alien fungal spaceship?
Location: Ocean Beach, CA
July 27, 2011 6:18 pm
JULY 27, 2011
This is the 2nd year our yard is well-populated by old-bamboo-fiber-stripping lawn-level cruising maybe paper-wasps of some sort judging by looks and behavior.
Visually back-tracking them to their apparent home in a 30+ ft high mature date palm a half block away we discovered a very disconcerting structure.
We don’t know if the structure is related to the wasps or not because we can’t get up there (and frankly don’t want to without hazmat gear), but – well, you can see in the images that it’s highly coincidental.
So, omniscient entomologistas: Paper Wasps? European neo-bauhaus nest? Alien fungal growth?
ps: the city vector crew were nonplussed and apathetic, equally.
Signature: mrobertson

hive mrobertson 300x206 Mystery Thing in a Date Palm

Thing with Bees

Hi again mrobertson,
We have already addressed the European Paper Wasp image you supplied, and we can say with assurance that this mysterious “alien fungal growth” is not related to the wasps, however, it does appear to have two insects flying toward it and though it is difficult to make out details, those insects have the same general appearance of Honey Bees.  Honey Bees do have a somewhat distinctive carriage while in flight, and the insects in the photo are consistent with that shape.  There also appears to be another insect that might be a Honey Bee crawling on the “thing”.  While this “thing” looks nothing like a honeycomb, it might somehow be related to a bee hive, but we are not sure how.  Perhaps the tree originally held the nest of a woodpecker, and dripping sap hardened and created the shape under the hole.  Bees might have moved into the vacant hole after the woodpecker left.  We will try to contact Eric Eaton to see if he has any thoughts on this matter.  For now, we will tag this as a mystery.  We have also taken the liberty of creating a composite of the two flying insects so that they appear closer together in the enlarged version than they are in the original photograph.

insect composite mrobertson 300x234 Mystery Thing in a Date Palm

Honey Bees or UFOs????

Apis and Inherent Omniscience
Dear Daniel,
Thank you for your time and effort.
Re omniscient: Not flattery, but an expression of hope – and thinking more along the lines of “inherent omniscience”, i.e., “the ability to know anything you choose to know that can be known” (various) and hoping that you would find out and choose to tell me as well. However let us not delve into teleological nomenclature but instead hear me admit that – I was afraid those were bees and your observation largely honks hours of patient sleuthing. Dang.
In 25 years here in Ocean Beach my madly ornithological ladyfriend has never seen or heard a woodpecker. We do however know what makes the holes:

parrot oceanside mrobertson 300x206 Mystery Thing in a Date Palm

What's That Parrot??

after which they nest in them of course.
Date Palm trunks don’t have sticky sap that would run, nor are their cellulose interiors in any way green or anything but white-ish.
I have read somewhere – LSU ento site? That some indwelling wasps may wet and soften the material of a wood enclosure (such as the studs in your walls or a tree cavity), chew the wood up and force it out of cracks or holes to allow the nest to expand – which may form strange extruded shapes.
But these are bees, right? Maybe they weren’t always bees…
Working at the limit of our prosumer cameras from a neighbors elevated driveway a hundred feet away we got a few more revealing images of the “weird thing”.

thing mrobertson1 300x227 Mystery Thing in a Date Palm

"Thing" might be expanding foam (see comments)

I feel the “thing” is associated with the hive – you can see damaged or melted comb cells or something like that. In one still inadequate image you can see what appears to be a bee on the lip of the “thing”. In another, darker image – the mass appears to have the glow of encaustic wax.
I don’t see any significant difference in the structural shape between the March and July images – and we had some serious rain which lends to a theory of water resistance.
I cut the “thing” image out, dragged it into a google image search box  – and that worthy AI returned images of cast busts of heads of Paul Tillich, John Gorton of Australia, an asian deity, assorted meteoric stone – and diving way down  – a Jurassic Termite Nest of sedimentary rock.
Oh well. Someday.
Finally, for the goosebumply thrill of it – an all time horrorshow yellowjacket nest image  – from upper Michigan I believe:
http://www.pestid.msu.edu/Portals/0/dnnPhotoGallery/955/626.jpg
one which makes me reflexively grab for my Epi-Pen.
Curiously yours,
/mrobertson
[edit note: Edit, Cut, Paste, Ignore. Download any image you might wish to use or save rather than linking, as things in that dropbox are not permalink. MSU EDU image not mine]

yellow jacket nest in car 300x233 Mystery Thing in a Date Palm

Yellow Jacket Nest in Car (from MSU)

Hi Again mrobertson,
Thanks for the wonderful update.  We believe the image of the Honey Bee on the “Thing” supports our theory that there is a bee hive there.  Perhaps you didn’t notice the comment provided by Aariq who wrote:  “To me it looks almost like someone tried to get rid of the wasps by sealing up their hole with expanding foam, and then they just ate holes through it. That’s awfully high up to go through that sort of effort though.

 

2

What's That Bug? does not endorse extermination

Cuckoo Leafcutting Bees Battling

Bees doing a dance on dead apple tree branch

sand wasp dan 300x206 Cuckoo Leafcutting Bees Battling

Cuckoo Leafcutting Bee

Bees doing a dance on dead apple tree branch
Location: Henderson, NV (Near Black Mountain)
July 18, 2011 11:42 pm
We had two little bees (around 1.5-2.0 cm) doing a dance on a dead branch of an Apple tree around sunset today (July 18) One bee would grab hold of the end of the branch with its Mandibles and front legs, fold its wings, and stretch out the back legs straight. When the second bee flew around, the first would arch its back up for a little until the second would land, then fly off.
I looked through this site and http://bugguide.net/ – but couldn’t quite classify it, maybe a Mining Bee?
Signature: Dan

sand wasps dan 300x175 Cuckoo Leafcutting Bees Battling

Battling Cuckoo Leafcutting Bees

Hi Dan,
First, we must compliment you on an awesome series of photos of what we believe to be some species of Sand Wasp in the tribe Bembicini (see BugGuide) engaging in what appears to be a courting and mating “dance”.  We are going to try to enlist the assistance of Eric Eaton to confirm our identification and perhaps to provide more specificity.

sand wasps mating dan 300x206 Cuckoo Leafcutting Bees Battling

Battling Cuckoo Leafcutting Bees

Eric Eaton provides a correction
Daniel:
These are actually cuckoo leafcutter bees in the genus Coelioxys.  They are both females.  The first image shows one in its “sleeping” posture, gripping the bud with its jaws.  I think the second specimen wanted to displace the first one since good sleeping quarters are in short supply (?).  So, it is a battle, not mating icon smile Cuckoo Leafcutting Bees Battling
Coelioxys are kleptoparasites of leafcutter bees in the genus Megachile.  The female Coelioxys lays her egg in the nest of her host.  The larva that hatches then eats (steals) the pollen and nectar stored by the host bee.
Eric

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Carpenter Bee

Request: Carpenter Bee?
Location: San Antonio, TX Medical Center
July 19, 2011 3:12 pm
Watching and takikng pics of flowers, trees, plants, bugs and other interesting stuff. Was watching a planting of Esperanzas (Tecoma Stans) noting lots of bee activity, then noticed blossoms sort of randomly dropping off. No wind. Got a pic of this bee, do not know if male or female, burrowing into the base of the flowers, I assume extracting nectar, sort of poking in the back door instead of pollinating through the front. Have never seen one this ”metallic” before. HAd much fun stepping around the shrubs trying not to disturb the bees, to get a good shot and also before the UTHSCA Police (Univ Tx Health Science Center San Antonio) ran me off. They plant many interesting drought tolerant flowering plants there an I am usually able to come away from my doc appt with some nice pics.
Signature: Renee

carpenter bee renee 300x247 Carpenter Bee

Carpenter Bee

Hi Renee,
This is a Carpenter Bee, and we have watched Valley Carpenter Bees feeding in a similar manner from sweet pea blossoms in our own garden.

Hanging Thief eats Bumble Bee

Wasp Predating on Bee
Location: Eatonton GA (Middle GA)
July 20, 2011 6:30 am
Hello!
I love the daily Bug posts on Facebook. I’m a gardener and see all sorts of interesting insects. Here are two photos of a wasp eating a bee in my pole beans. I don’t know what kind of wasp this is – they typically eat pests and nectar. I think the bee is a wood bee – we have many of them.
Signature: GA Gardener

hanging thief eats bee georgia 300x204 Hanging Thief eats Bumble Bee

Hanging Thief eats Bumble Bee

Dear GA Gardener,
This adroit predator is a Hanging Thief, a species of Robber Fly, and it appears that it has caught and is feeding upon a small Bumble Bee.  You should be able to tell how the Hanging Thief got its common name as your photo clearly shows it hanging from a single leg as it is feeding.  The prey is typically caught on the wing.

2

Sonoran Bumble Bee

is this some type of Yellow Backed Bumble?
Location: Hawthorne, CA
July 18, 2011 5:27 pm
I can’t figure it out. You’re so great at helping me, I thought I’d send you yet another photo. It/they seem very attracted to the catmint plants that I’ve let bloom this summer, but until today have been to shy to get a shot of. We’ve had yellow faced bumbles and male and female carpenter bees this year, but I’m positive this is something different. Can you help?
Signature: Thanks, Anna Carreon

sonoran bumblebee anna 300x206 Sonoran Bumble Bee

Sonoran Bumble Bee

Hi Anna,
According to Charles Hogue in his wonderful book Insects of the Los Angeles Basin, there are four species of Bumble Bees in our area, and this is the Sonoran Bumble Bee,
Bombus sonorus, a species not previously represented on our website, so we are very happy to get your photo.  You may verify our identification by comparing the photos on Bugguide.

1

Nest of a Leafcutter Bee

What kind of bug made this?
Location:  Cleveland Ohio
July 12, 2011.  6:00 PM
Hi bugman we live in the Cleveland area in Ohio and we found this cocoon and we do not know what kind of bug is in it. I took it apart and found it had 4 sections to it. This thing is amazing it is made of rolled up leaves.incredible.
Norman

nest leafcutter bee norman 300x291 Nest of a Leafcutter Bee

Nest of a Leafcutter Bee

Hi Norman,
This is the nest of a Leafcutter Bee in the genus
Megachile.  According to the It’s Nature website: “The female constructs a nests in tree cavities and various gaps, sometimes even on the ground. These nests have a complex structure of many tunnels and compartments for the larvae. Leaf-cutter bees have incredible construction skills – they skillfully choose the best leaf “material” for their nests and glue it with their saliva, resulting in a sturdy being built. The favourite material for these bees is rose leaves and flowers.”   We are post dating your letter to go live on Friday while we are out of the office.

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