Mid-winter note from Wellington: heft, don't open — why you leave the cluster alone in June and July

A thread for the Southern Hemisphere crowd, since the forum is understandably wall-to-wall swarms and supers right now. It's cold, grey mid-winter here in Wellington and I did my stores round this afternoon: six hives, and I never cracked a single lid. The whole check is hefting — tip each hive slightly from the back and feel the weight. You learn the scale fast: 'can barely lift' is a happy hive, 'swings up easily' means reach for the fondant. I put a sugar brick on one light hive today through the notch in the crown board, ten seconds, lid back on. Why not look inside? Because the winter cluster is a heat engine — bees shivering to keep the core above about 20°C (way warmer if there's brood). Break the propolis seal and dump the warm air on a 10°C day and they'll spend a chunk of their stores and body reserves reheating, for information your arms could've told you. Inspections can wait for the first decent spring day. New SH keepers: strap the lids, heft monthly, keep entrances clear after storms, and leave them be.