[Pollinator] [beemonitoring] Male carder bees wound native bees?

[Peter Bernhardt]

Thank you, John>  Did you watch the video?  It looks like those males are
defending flowering clumps.  So, they don't stab.  They rip or damage
wings, very interesting.

Peter

On Wed, May 13, 2015 at 9:18 PM, John Plant <john.plant3 at hotmail.com> wrote:

>   We found that territorial males of Anthidium manicatum would attack
> most any flower-visitor to Stachys byzanthina, especially honeybees. Some
> attacks resulted in the death of the intruder, mostly honeybees and
> occasionally a bumblebee. Long-tongued solitary bees such as Megachile and
> Anthophora were generally too nimble.
>
> They did not kill by puncture; rather the base of one of the forewings
> gets torn or broken, making the victim unable to fly.
>
> The species only shows territorial behavior if the flowers it defends are
> numerous and clumped together.
>
> John Plant
>
>  *From:* mailto:beemonitoring-noreply at yahoogroups.com
> <beemonitoring-noreply at yahoogroups.com>
> *Sent:* Wednesday, May 13, 2015 13:23
> *To:* Peter Bernhardt <bernhap2 at slu.edu> ; Bee United
> <beemonitoring at yahoogroups.com> ; Pollinator List-serv
> <pollinator at lists.sonic.net> ; 任宗昕 <renzongxin at mail.kib.ac.cn> ; John
> Alcock <j.alcock at asu.edu>
> *Subject:* Re: [beemonitoring] Male carder bees wound native bees?
>
>
>
> On 5/13/15 6:12 AM, Peter Bernhardt bernhap2 at slu.edu [beemonitoring]
> wrote:
>
>
>
>
>    Male bees lack stings for obvious reasons but these males evolved a
> "sting" much the same way a panda has evolved a thumb.  It's the old
> natural selection fiddling with spare parts story publicized by the late
> S.J. Gould.  Does anyone know of other life-histories of male bees with
> such "pseudo stingers?"
>
>
> Aggressive territorial males occur at least in Anthidium and Megachile
> (e.g., the aptly name M. pugnata), though only Anthidium (some but not all
> species) have actual "prongs" that could be used to puncture. It is perhaps
> not a coincidence that Anthidium is one of the few bee genera where males
> are substantially larger than females. The ability of manicatum to wound
> other bees has been noted in the literature and anecdotally for many years;
> I'm not aware of any other species known to do this.
>
> Peace,
>
> --
> Doug Yanega      Dept. of Entomology       Entomology Research Museum
> Univ. of California, Riverside, CA 92521-0314     skype: dyanega
> phone: (951) 827-4315 (disclaimer: opinions are mine, not UCR's)
>              http://cache.ucr.edu/~heraty/yanega.html
>   "There are some enterprises in which a careful disorderliness
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