Suicide is good citizenship.

An injured bee will sting itself if it is unable to return to the hive. A sick bee will remove itself from the colony, and thus die, thereby protecting others from disease. It is a far better thing, says the bee.

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Rueppell, Hayworth, and Ross, “Altruistic Self-removal of Health-compromised Honey Bee Workers from their Hive,” Journal of Evolutionary Biology 23, no. 7 (2010): 1538-46.