Skip to content

Mass murders in self defense

July 6, 2009
Survival Beehavior
clipped from news.bbc.co.uk

Honeybee mobs overpower hornets
Honeybee hordes use two weapons – heat and carbon dioxide – to kill their natural enemies, giant hornets.

Japanese honeybees form “bee balls” – mobbing and smothering the predators.

This has previously been referred to as “heat-balling”, but a study has now shown that carbon dioxide also plays a role in its lethal effectiveness.

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.

No comments yet

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: