Action of animals deliberately ejecting blood from their bodies
Horned lizard showing evidence of autohaemorrhaging
Autohaemorrhaging, or reflex bleeding, is the action of animals deliberately ejecting blood from their bodies. Autohaemorrhaging has been observed as occurring in two variations.[1] In the first form, blood is squirted toward a predator. The blood of these animals usually contains toxic compounds, making the behaviour an effective chemical defence mechanism. In the second form, blood is not squirted, but is slowly emitted from the animal's body. This form appears to serve a deterrent effect, and is used by animals whose blood does not seem to be toxic.[1] Most animals that autohaemorrhage are insects, but some reptiles also display this behaviour.[2]
Some organisms have shown an ability to tailor their autohaemorrhaging response. Armoured crickets will projectile autohaemorrhage over longer distances when attacked from the side, compared to being attacked from an overhead predator.[3]
^ abIftime, Alexandru; Iftime, Oana (January 2014). "Thanatosis and autohaemorrhaging in the Aesculapian Snake Zamenis". Herpetozoa. 26 (3–4): 173–174 – via Zobodat.
^Bateman, P. W.; Fleming, P. A. (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.
^Bateman, Philip W.; Fleming, Patricia A. (2012-04-26). "Signaling or Not-Signaling: Variation in Vulnerability and Defense Tactics of Armored Ground Crickets (Acanthoplus Speiseri: Orthoptera, Tettigoniidae, Hetrodinae)". Journal of Insect Behavior. 26 (1): 14–22. doi:10.1007/s10905-012-9329-5. ISSN 0892-7553. S2CID 18599346.
Autohaemorrhaging, or reflex bleeding, is the action of animals deliberately ejecting blood from their bodies. Autohaemorrhaging has been observed as occurring...
Another defense against predators is reflex bleeding (also called "autohaemorrhaging") in which the insects squirt haemolymph from pores in their exoskeleton...
(thanatosis) by becoming completely limp when they may also secrete blood (autohaemorrhage) from the mouth and nose. They may also perform an aggressive display...
arachnid locomotion. Some species of insect or arachnid are able to autohaemorrhage when they are attacked by predators. Queens of the ant genus Leptanilla...
(thanatosis) by becoming completely limp when they may also secrete blood (autohaemorrhage) from the mouth and nose. They may also perform an aggressive display...
Lampaul-Guimiliau, where blood gushes from his neck. Some animals deliberately autohaemorrhage or squirt blood as a defense mechanism. Armored crickets, which are...
Bateman, Philip; Fleming, P. A. (28 April 2009). "There will be blood: autohaemorrhage behaviour as part of the defence repertoire of an insect". Journal...
rats, rabbits and pigs. Aggressive mimicry Anti-predator adaptation Autohaemorrhaging – animals deliberately ejecting haemolymph or blood from their bodies...
and the use of their powerful mandibles to inflict a painful bite. Autohaemorrhaging of hemolymph, which contains toxic phytotoxins, is another defensive...
of human habitation. They have an interesting defensive habit of Autohaemorrhaging from the mouth, nostrils and eyes when disturbed. Some species also...
T. bipustulata, is a black beetle with red spots which engages in autohaemorrhaging as a defensive behavior. Molecular analysis suggests that Tritoma...
Global Information