Moving a honey bee colony is a balancing act between three risks: overheating a sealed-up colony that can no longer fan and evaporate water to cool the nest, bees escaping through open mesh if the load is disturbed in daylight, and physical stress from vibration that can dislodge comb. UK migratory beekeepers manage all three by moving hives at night, once foragers are home, with secure travel screens that let air through but not bees.
Commercial UK beekeepers moving hives for oilseed rape, fruit-orchard pollination contracts or the heather moors often strap 4–6 colonies to a single pallet and travel through the night, arriving before dawn so the bees wake up already at their new forage site.
A strapped-down pallet of hives rides a flatbed trailer through a stretch of countryside — set the road speed, outside temperature, hive count, time of day and ventilation screens, and watch internal hive temperature, colony stress and escaped foragers respond in real time.
Sealed hives trap metabolic heat that the colony can no longer vent by fanning; open travel screens cool the nest with road-speed airflow but let a few daytime foragers try to leave. The colony stress index blends heat load, vibration and daytime disturbance the way a real migratory move would.
Drag road speed, ambient temperature and the hive-count slider, switch between night and day travel, and toggle the ventilation screens. Watch the bees around each entrance grow calmer or more agitated, and see foragers drift away whenever screens are open in daylight.
UK migratory beekeepers usually move colonies for oilseed rape, orchard pollination contracts or the heather moors overnight, when every forager is home and the whole colony can be sealed calmly before first light.