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Bees and their predators

Has anybody seen a bee or some other insect walk all over one of its regular predators without suffering any ill effects?
Here are two instances, one of a halictid and a crab spider by Anita, Flickr, and my video of a megachilid and an ambush bug. In this case, I saw the ambush bug drop a fly it was feeding on when I touched and lightly shook the shrub, just before the bee entered the scene. So it must have been pretty satiated.
If anybody has seen something similar I would like to know.

Not sure if this qualifies
Bees and wasps are my main interest in insect photography and I pretty commonly spot the crab spiders on the flowers the bees are pollinating, generally after I am home and viewing the photos on the computer. I did see this one while I was taking the photos so I composed to include it. The bee went all over and around the spider on this flower. I had assumed this bee would be too large to be prey for a crab spider, am I wrong?


Predator or Not
I once witnessed a tiny ant crawl along the edge of a Canyon Treefrog's eye! The treefrog didn't move a molecule! I was very impressed. Those Canyon Treefrogs are heavy, heavy dudes.

A marginal example
Not exactly what you asked for, but I spotted an ant intimidating a spider that could have preyed on it:

Here's my series. Mandibular gland repellent??
I posted 4 shots to BugGuide; here's the one of the encounter itself:



It almost looks like the bee is biting the spider! At any rate, the bee has obviously avoided the clutches of the 'claws' & seems to have turned the tables somehow. So what the heck is going on here??

A google search on "bee mandibles 'crab spider'" (more out of desperation than anything else!) turned up something in the scientific literature about bee mandibular gland secretions repelling spiders, at least temporarily -- long enough to give the bee a chance to get away, if it's lucky (JH Cane, J Chem Ecol 12:1295, 1986; www.springerlink.com/content/hp9j7t4236822668/).

Hoping Dr Ascher or one of the many other knowledgeable folks here will have some ideas. And ID help on bee or spider of course welcome too.

A bee, a bug and a spider enter this bar...
I have a fascinating (to me) series that "almost" meets your request involving an ambush bug, honey bee and crab spider (and actually several others.) I say "almost" because it appears that the bee might have been a bit large for those particular predators to take on while it was stomping around freely. It would have been nice if Alice's call for a "Behavior Explanation Request Page" had produced results. I don't quite know what to do when I already know who is involved in an activity but wonder what they are doing - particularly when several photo's are required to fully show the activity or the participants.

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