Bark beetles have armoured spiky asses most of the times since their heads are deep into that bark with only dat ass exposed.what the fuck that's nuts
Biedermann and Taborsky made a more detailed study of behaviour within the galleries of X. saxesenii, focusing on the division of labour. They recorded six behaviours that they called digging (extending the galleries), cropping (caring for the fungus garden), allogrooming (cleaning each other), balling (compacting waste), shuffling (getting rid of waste), and blocking (protecting from predators and preventing larvae from getting lost).
They found a new form of division of labour rarely found in ants, bees and wasps: division of labour between the adults and the larvae.
The larvae of ambrosia beetles do their bit to maintain the galleries. The larvae specialise mainly in digging and balling; young females specialise in cropping and shuffling; mature females in cropping and blocking; and the adult males specialise in allogrooming.
As in the previous experiment with hygienic behaviour, they found that mature females are less likely to disperse if there is work at home. Their strategy makes sense because there are readymade opportunities to gain indirect fitness by staying at home compared to gaining direct fitness by dispersing.