Bees out of the hive

Bees out of the hive

Observation - Bees out of the hive - UK and Ireland. Description: I found 10s of dead and dying bees yesterday on top of some fresh overnight snow. Anyone else seen anything like this/potential explanations?

I found 10s of dead and dying bees yesterday on top of some fresh overnight snow. Anyone else seen anything like this/potential explanations?