Indonesia is one of the world's centres of tropical bee diversity — including klanceng. And that diversity is contracting.
More than 40 stingless bee species are recorded in Indonesia. Compare that: all of Europe has not one native species. Stingless bees are tropical animals, and Indonesia is one of the last places where they still exist in large numbers. Not just a fortunate accident of geography — one of the last places this richness still survives.
But the conditions that made it possible — old forests, hollow trees, flowering plants year-round — are disappearing faster than they can be replaced.
Indonesia's Centre Is Eroding
Stingless bees live in wood cavities, rock crevices, bamboo, sometimes inside the walls of old buildings. A single colony can persist in the same location for years — but only if it isn't disturbed.
When old trees are felled for urban expansion, the colonies inside disappear with them. When old houses are renovated and walls torn out, the colonies that lived there have nowhere to go. Unlike birds that can fly long distances to find a new tree, a stingless bee colony whose queen is already physogastric — abdomen swollen with eggs after mating, too large to fit back through the entrance — simply cannot relocate.
In one survey in Riau, researchers found 90 wild stingless bee colonies. Of those, 95.6% were large-bodied species (Heterotrigona itama). T. laeviceps — the most resilient species — accounted for only 3 of 90. Not an extinction number, but a picture of how thin wild colony density has become even in still-green areas.
The Biggest Threat for Urban Klanceng
For colonies living in cities, the biggest threat isn't deforestation. That's distant.
The biggest threat is fogging.
Every time local authorities or residents spray insecticide smoke to control mosquitoes, pyrethroid insecticides spread across a radius of hundreds of metres. Foragers flying at the time die immediately. Foragers that return to the box carry residue that enters the food chain inside the nest. A colony exposed repeatedly doesn't die outright — it weakens gradually, brood production drops, the population shrinks until it can no longer recover.
In Jakarta, fogging can happen any time — sometimes without notice. One evening's spray can eliminate a third of a colony's active foragers within hours.
Beyond fogging: pesticides from ornamental plants and gardens sprayed on routine schedules, urban monocultures that bloom all at once then go quiet for months, trees pruned back before they can flower. All of it erodes the food supply within forager range.
What Nobody Is Counting
In Europe and the United States, bee population decline has been monitored systematically since the 1990s. There are annual figures. Government reports. Colony loss databases per season.
In Indonesia, almost nothing.
There's no national monitoring system for wild bee populations. No figure for how many stingless bee colonies are lost per year. No updated distribution map. What exists are isolated studies from a handful of universities — in Riau, East Java, North Sumatra — each capturing one corner of a much larger problem.
Globally, the UN's biodiversity science panel (IPBES) estimates 40% of insect pollinator species face extinction risk. The FAO notes that 71 of the world's 100 main food crops depend on bee pollination. Indonesia is one of the world's largest producers of tropical fruit — durian, rambutan, mangosteen, longan — all dependent on pollinators.
We don't know how bad the situation is here. That itself is already a problem.
Klanceng in Cities: A Point Still Lit
T. laeviceps is the species best suited to survive conditions that have already changed. It nests in small wooden boxes, wall cavities, pots. It forages within 200–500 m — enough to work the flowering plants in Jakarta's alleyways. It tolerates unreliable food supply better than other stingless bee species. Others are already struggling; T. laeviceps still can.
Every colony kept in a city is one active node in a pollination network that still functions in an already-fragmented ecosystem. Not a solution to the overall crisis — one box doesn't change deforestation patterns or stop the neighbourhood fogging schedule. But it's not nothing either.
More importantly: every keeper who learns to read their colony — who knows when fogging happened, who knows the difference between a healthy colony and one quietly declining — is one more person paying attention to something almost nobody is watching.
In a country with no national monitoring system, that attention is not a small thing.
Next: → Klanceng as a pollinator: the value nobody counts — the concrete role klanceng plays in the food system around you → You're taking their honey. Is that fair? — on the relationship between keeper and a colony that's already under pressure