A honeybee colony works hard to hold its brood nest close to 34.5–35.5°C, whatever the weather outside — the eggs and larvae simply won't develop correctly outside that narrow band. Bees do this by clustering, shivering their flight muscles to generate heat, and fanning their wings at the entrance to pull air through the hive when it gets too warm. This lab renders the brood comb as a 3D honeycomb heat-map: each cell's height and colour show how far its temperature has drifted from the 35°C ideal, so you can see the stable core and the noisier, more exposed rim at a glance.
Because a single sensor a few centimetres off-centre can read several degrees differently from the true core, beekeepers who monitor hives remotely are usually better off tracking the shape of the daily curve — and sudden changes in it — rather than treating any one absolute reading as diagnostic.
A 3D honeycomb heat-map of a beehive's brood nest, showing how workers hold the core near 35°C while the periphery drifts with the weather — and how much a sensor's exact position changes the number it reports.
Each hex cell's height and colour encode its live temperature. The core stays pinned near the ideal 34–36°C band regardless of outside conditions; cells nearer the comb edge swing with the outside temperature, especially in a weak colony or without fanning.
Set the outside temperature and colony strength, drag the sensor from the core out to the wall, and watch the display board log its readings. Toggle fanning and speed up the day/night cycle to see the nest buffer — or fail to buffer — real fluctuations.
Brood needs a stable ~35°C to develop properly — deviations of just a couple of degrees for extended periods can produce malformed wings or shortened lifespans in emerging bees.