Colony health

A swarm of 20,000 bees hanging from a tree branch looks alarming. It's actually a colony doing something it's been doing for millions of years - and it's remarkably deliberate.

A worker bee lives six weeks. Her mother, the queen, can live five years. They hatch from identical eggs. The difference comes down to what they were fed as larvae.

The 2024-25 season hit 55.6% annual colony losses - the worst on record. But Louisiana lost 71% while Vermont lost 21%. The national number hides what's actually happening state by state.

When nectar dries up, strong colonies will raid their neighbors. A robbing frenzy can strip a weaker hive bare in hours. The triggers are predictable.

EFB kills larvae before capping, leaving twisted yellow-brown bodies in cells. Strong colonies sometimes outgrow it. Diagnosis is harder than textbooks say.

Ask a beekeeper how many bees are in a hive and watch them pause. The honest answer involves a lot of 'it depends' - and those fluctuations tell a bigger story about colony survival.

The queen produces 500 micrograms of pheromone daily that suppresses 50,000 workers' reproduction. The alarm pheromone is chemically identical to banana oil.

Commercial operations are putting bees in refrigerated warehouses at 40F for winter. Survival rates beat outdoor wintering. The bees don't seem to mind.

The USDA has bred for Varroa resistance since 1997. VSH bees, Russian bees, Pol-line stock - the genetics work. Scaling them to the industry is the bottleneck.

Nosema ceranae replaced N. apis as the dominant gut parasite in US hives. Fumagillin, the standard treatment, was pulled in the EU. The US still uses it.

AFB spores survive 70+ years. There's no cure for infected comb. Most states require burning. It's the only bee disease that makes gear worthless overnight.

Bees don't hibernate. They cluster and vibrate flight muscles to generate heat. The core stays at 93F. The outer shell drops to 46F. They rotate all winter.

Bees collect plant resins and mix them into propolis - a substance with antimicrobial properties lining every hive surface. Their immune system, externalized.

Male bees have no stinger, no pollen baskets, and can't feed themselves. Their entire existence is built around one moment that kills them. The ones who miss it get dragged outside in August to starve. Drone biology is not a happy story.

Smoke doesn't calm bees. It triggers a gorging response - they fill their honey stomachs preparing to evacuate. A full bee is less aggressive. That's the trick.

Oxalic acid kills 90-95% of phoretic mites in a single broodless application. It's cheap, organic-approved, and has become the winter treatment of choice.

No eggs, no larvae, no way to make a new queen until spring. A winter queenless colony is a dead colony walking. Most beekeepers won't know until March.

From oil traps to Beetle Blasters to Freeman traps. The small hive beetle arrived in 1998 and beekeepers have been improvising containment ever since.

The professionals lose more colonies than the hobbyists. That's not a statistical quirk - it's a structural problem baked into commercial-scale beekeeping. What's different about operating at scale, and why it costs more bees.