A hive beetle and some ruined honey.
The hive beetle is the little black thing in center,
and the brown cell next to it is ruined.
The bees are clearing out bad honey around it.

Well, the hive has hive beetles. The beetles have been eating the honey, leaving their waste in it, laying their eggs in it, an generally ruining it any way possible. Luckily, it does seem to be a fairly small infestation, and I"ve set up an oil trap for them. The bees chase the beetles away if they find any, so they need a hiding place. The trap has holes in it small enough that the beetles can fit through but the bees can't, so that"s where the beetles go. But the trap is full of oil, so the beetles drown.

Here I am filling the oil trap.