Anyone know what happened here?

[Dave McCormick]

I was out today and in a path leading into a forest, all around were dead bumble bees, with their heads gone. Here is a pic:



Now, there was over 20 dead, all looking the same, no head. I have never seen such a thing before. Anyone know what happened?

[Annie]

I did read somewhere that wasps will bite the heads off already dead bees and take the thoraxes back to their nest for the young to feed on - but I don't think that could apply in this instance because it looks like the bodies have been discarded after decapitation, almost as if they were of no use

[Bryan H]

Dave,

Looks like a sting to me...

Bryan

[Chris]

Dave I'd say a hornet has raided a bumble bee nest for the grubs, decapitating all the bees that attacked it in the process.... but where you are in NI there are no hornets are there? So must be a wasp as Annie suggested. In the "Life in the Undergrowth" series there was footage of 6 or 7 japanese hornets raiding a honey bees nest and decapitating literally 1000s of honey bees in just a few minutes, to get to the grubs and honey.

[Dave McCormick]

Yeah, you could be right about hornets there. There are hornets here, I have only seen a few before, non e reciently, but will keep a lookout. Thanks for ideas guys

[Padfield]

I Googled 'headless bees' and one of the first headings that came up was this:

JSTOR: The Baltimore Oriole and Carpenter-Bee- [ Traduire cette page ]It was only under these trees that the headless bees were found, but there they lay in hundreds; the ground was literally speckled with them. ...
links.jstor.org/sici?sici=0003-0147(187212)6%3A12%3C721%3ATBOAC%3E2.0.CO%3B2-Z - Pages similaires - À noter

Unfortunately when I clicked on the page it told me I didn't have the right to access the document. But clearly someone has already investigated this phenomenon...

Guy