Researchers in Yogyakarta once counted every natural enemy found around a single klanceng colony site. The result: 628 individuals from 11 different species.
Ants. Wasps. Geckos. Spiders. Even monkeys.
Those numbers aren't meant to alarm. They're meant to show that the threats to a klanceng colony are real, specific, and — for the most part — preventable with simple steps.
Ants — The Number One Threat
Of those 628 natural enemies, 569 were ants. More than 90%.
Not wasps. Not geckos. Ants.
There are two types of ant threat, and they work differently.
Klanceng have a natural defence mechanism: they narrow their nest entrance down to the smallest possible opening — just wide enough for one bee to pass at a time. This works against large ants, weaver ants, wasps, and geckos. All too large to squeeze through.
What gets in: small ants. Precisely because they're smaller than the klanceng themselves, they can slip through any gap that isn't sealed completely. Once inside, they steal honey from the storage pots and eat eggs and larvae from the brood cells — the sections of the nest where eggs hatch and larvae develop into adult bees. The colony is hollowed out slowly from within.
Large ants — like weaver ants (Oecophylla smaragdina) — work differently. They don't infiltrate: they swarm. They arrive in large numbers simultaneously, directly at the entrance. Klanceng have no sting, only biting as defence. Against dozens of ants arriving together, the colony's defences can be overwhelmed.
Prevention:
The stand is your primary defence. Put all stand legs in containers of water — ants can't swim. Or coat them with used engine oil. Petroleum jelly also works but needs more frequent replacement as it dries and collects dust.
Check and renew the coating every few weeks. This is the simplest and most important maintenance you can do.
Vespa Wasps — The Ambush at the Door
Vespa wasps (Vespa affinis is the species most commonly found at klanceng nests in Indonesia) have a specific tactic: they don't attack in the air. They hide directly below the nest entrance and wait.
Every bee leaving or entering passes over their position. They take them one by one.
This isn't random predation. It's deliberate, learned behaviour. Vespa affinis is also documented hiding behind leaves on forage plants — targeting bees mid-flight at flowers.
Prevention:
Hang reflective objects near the apiary — old CDs, strips of aluminium foil, small mirrors. Reflected light disrupts wasps' orientation. Not 100% effective, but documented to reduce attack frequency.
If you consistently see the same wasp circling in front of the nest entrance — that's scouting behaviour. Remove it manually before it establishes a hunting post at the entrance.
Spiders — The Invisible Trap
Of the 628 natural enemies recorded at that Yogyakarta site, 19 were spiders — more than geckos.
Spiders don't chase bees. They build webs along established flight paths — near forage plants, around the nest entrance, between plants that foragers regularly visit. Bees get caught not because they're careless but because webs are invisible at foraging speed.
The most dangerous: Nephila pilipes, the golden silk orb-weaver. Its leg span can reach 20 cm. Its venom is a mix of neurotoxins and necrotoxins — immobilising a bee within seconds of entrapment.
Prevention:
Clear spider webs from around the hive and forage plants once a week. No need to kill the spider — just destroy the web. They'll relocate to somewhere quieter.
Geckos — The Nocturnal Predator
When I first got my colony, I noticed geckos gathering near the stup — some hiding under the plywood I'd placed as a roof.
House geckos are nocturnal predators. They become active roughly six hours after sunset. Their method: wait near the nest entrance, then catch bees that emerge using their sticky saliva. Their camouflage colouring makes them nearly invisible to bees.
Klanceng aren't active at night, but some bees may emerge when disturbed. That's what geckos are waiting for.
Prevention:
A stand already protected from ants (water containers or oil on the legs) also makes it harder for geckos to climb to the hive. Also check that there are no easy climbing surfaces leading directly to the box — walls, climbing plants, strings or ropes hanging near the stup.
The good news: in my experience, the geckos that gathered early eventually left on their own. They may have learned that klanceng aren't easy prey.
Termites — The Overlooked Threat
Termites don't attack the bees or the honey. They attack the wooden structure of the stup itself.
A hive box eaten from the inside by termites can lose structural integrity — and the colony loses its home. This is a slow but serious threat, especially in humid climates like Indonesia's.
Check the bottom and sides of the box regularly. Powdery wood dust or small mud tubes on the wood surface are signs of termite activity.
Termites that naturally coexist with a klanceng colony in the wild should be left undisturbed — forced separation can trigger conflict that kills bees. But termites attacking the wooden hive box are a separate problem that needs addressing.
Other Threats Worth Knowing
Sparrows: eat bees directly during foraging at flowers. Hard to prevent specifically — but a strong colony with many workers absorbs individual losses better.
Fly larvae: enter the stup and consume bees and honey. Keepers in Sumatra rate this among the highest-priority threats. Prevention is the same as for other pests: ensure all nest gaps are sealed.
Long-tailed macaques: in areas bordering forest or plantation land, macaques don't just threaten individual bees — they can take the entire hive box. If your apiary is near forested edges, secure the box physically.
One Rule That Applies to All Pests
Never spray insecticide or allow fogging near the hive — even if the spray isn't aimed at the bees. Insecticides in any concentration can kill an entire colony within hours.
This includes mosquito aerosol sprays, dengue fogging, and pesticides applied to plants in the surrounding area.
The colony has no way to protect itself from airborne chemical exposure. Prevention is entirely on the keeper's side.
Next: → How to start keeping klanceng — getting the basics right before pests become the issue → Common beginner mistakes in klanceng keeping — the decisions that create the vulnerabilities pests exploit