Reflex bleeding is a defensive behaviour in some insects where a noxious fluid is exuded by the insect when threatened. The fluid flows out through pores in the exoskeleton. The secretion consists of a bitter fluid, including haemolymph and noxious chemicals.
Bloody-nosed beetles and Ladybirds are possibly the most familiar insects capable of reflex bleeding but other insects such as froghoppers can also reflex bleed.
A photograph of a Bloody-nosed beetle (Timarcha tenebricosa). When threatened Bloody-nosed beetles exude a noxious red liquid through a process called reflex bleeding, this is how they get their name.
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