Why do bees die when they sting you? (2021)
Why honeybees die after stinging humans becomes a jumping-off point for arguing how evolution actually operates—whether traits like suicidal defense can be explained by group selection, or more convincingly by kin selection and genetics such as haplodiploidy. Commenters note that a worker’s barbed stinger usually only causes fatal injury when lodged in thick mammalian skin and that in their normal ecological context (fighting other insects, defending a hive) the cost to individual sterile workers is low while the benefit to the colony “superorganism” is high. The thread broadens into critiques of simplistic “survival of the fittest” stories, the limits of evolutionary “why” questions, and related examples such as human longevity, altruism, and honest signaling in other species.
Scope of the Discussion
- Thread centers on why honeybees die when stinging humans, and what this implies about evolution, altruism, and “superorganisms.”
- Much of the debate is about how to correctly explain this in evolutionary terms, and whether the article’s framing is accurate.
Group Selection vs Gene/Kin Selection
- Several commenters strongly reject “group selection” as a primary mechanism, arguing that:
- Selection operates at the level of genes; apparent group-level effects are usually kin selection.
- Haplodiploidy (male haploid, female diploid) in bees makes sisters unusually related (~75%), favoring altruistic worker behavior.
- Others defend the idea that multi-level or group-level selection can be a useful description, especially for eusocial “superorganisms,” but agree that many biologists are wary of it.
- Some criticize the article’s dismissal of haplodiploidy as too weak, given its explanatory power for eusociality.
Mechanics of Bee Stings
- Honeybee workers die when stinging mammals because barbed stingers lodge in elastic skin; when the bee pulls away, the abdomen is torn open.
- Against this, several point out:
- Bees can often sting insects without dying; the barbs don’t catch on exoskeletons.
- Queens have smooth, non-barbed stingers and can sting repeatedly, especially to kill rival queens.
- There are reports and videos of workers sometimes working the stinger loose from human skin and surviving, though others say most die once the stinger is embedded.
- Pheromones and sound from a stinging bee help recruit other workers, leading to swarm attacks on large threats.
“Why” Questions and Evolutionary Explanation
- Multiple comments criticize facile “survival of the fittest” stories as circular or unfalsifiable if they don’t specify concrete costs, benefits, and constraints.
- Others respond that:
- Evolution is about “fit enough,” not perfection; many traits persist simply because they’re not costly enough to be removed.
- Detailed historical causes are often unknowable; evolutionary narratives are more like constrained historical reconstructions than strict mechanistic proofs.
- The right question is often “how can this be consistent with selection and constraints?” rather than a single-purpose “why.”
Bees as Superorganisms and Human Parallels
- Many lean on the “superorganism” view: individual workers are disposable units serving colony-level reproduction, making suicidal defense less paradoxical.
- Some extend this to humans (grandparental care, eunuchs, taxes, social roles), but these analogies are debated and not treated as rigorous.