BBC:

Honeybee mobs overpower hornets
Japanese honeybees form "bee balls" - mobbing and smothering the predators.

In the journal Naturwissenschaften, the scientists describe how hornets are killed within 10 minutes when they are trapped inside a ball of bees.

Japanese giant hornets, which can be up to 5cm long, are voracious predators that can devastate bees' nests and consume their larvae.

But, if the bees spot their attacker in time, they mount a powerful defence in the form of a bee ball. This study found that the heat inside the bee ball alone was not enough to reliably kill the hornets; carbon dioxide also plays a role in [the bee ball's] lethal effectiveness.

Although I think it's excellent that bees can kill lethal predators with heat (proving Obama -- "We don't need more heat" -- is wrong), it's even better that bees kill hornets with hot air -- the Co₂! We in the blogosphere should be able to handle that...

But there's actually one more key detail:

... if the bees spot their attacker in time ...

Now, that hasn't always happened, has it? The bailouts, executive power, single payer... Again and again, the lethal predator hasn't been spotted in time (as for example here, at "I agree").