Suicide is warfare. Suicide is a warrior’s code.
In battle, the Malaysian exploding ant (Camponota saundersiant) swells a gland in its abdomen with acid and then bursts its abdomen wall, consuming its enemy along with itself.
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Jones et al., “The Chemistry of Exploding Ants, Camponotus SPP. (Cylindricus COMPLEX),” Journal of Chemical Ecology 30 (2004): 1479–92.