Autohaemorrhaging or reflex bleeding is the action of animals deliberately ejecting haemolymph or blood from their bodies. If the animal has toxic compounds in its blood, then it may be an effective chemical defence mechanism.
Animals that autohaemorrhage include:
- Meloidae (blister beetles) – their haemolymph contains cantharidin that they sequester from plants on which they feed.
- Timarcha species
- Chrysomelidae – their haemolymph contains anthraquinones.
- Coccinellidae (ladybird, ladybug or lady beetles) – An alkaloid toxin is exuded through the joints of the exoskeleton, triggered by mechanical stimulation (such as predator attack).
- Sawfly larvae
- Stonefly larvae
- Phrynosomatidae lizards
- Horned lizard – At least eight species are able to squirt an aimed stream of blood from the corners of the eyes, up to 5 feet (1.5 m).
- Bateman, Philip; P. A. Fleming (28 Apr 2009). "There will be blood: autohaemorrhage behaviour as part of the defence repertoire of an insect". Journal of Zoology. 278 (4): 342–348. doi:10.1111/j.1469-7998.2009.00582.x. ISSN 1469-7998. Retrieved 2009-07-08.
- The Alkaloids: chemistry and physiology, Volume 31 By Arnold Brossi
- Vinton Thompson and Gervasio S. Carvalho, "Abrupt Geographical Transition between Aposematic Color Forms in the Spittlebug Prosapia ignipectus (Fitch) (Hemiptera: Cercopidae)," Psyche, vol. 2016, Article ID 3623092, 10 pages, 2016. doi:10.1155/2016/3623092. https://www.hindawi.com/journals/psyche/2016/3623092/
- Media related to Autohaemorrhaging at Wikimedia Commons