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Differences between the venom of male and female Phoneutria nigriventer have been reported, with females producing a greater quantity of venom. [17] PhTx-2 is considered the most toxic group, which is also potent for primates. [18] Humans can be ten times more sensitive to the P. nigriventer venom compared to mice. Primates, such as monkeys and ...
The spitting spiders Scytodes can spit a venomous sticky fluid that traps its victims and also poisons them. [1] The bombardier beetle is unusual by using a violent exothermic chemical reaction to launch a boiling noxious chemical spray in a rapid burst of pulses from special glands in its abdomen, accompanied with a popping sound.
The spider usually strikes from a distance of 10 to 20 millimetres (0.39 to 0.79 in) and the entire attack sequence only lasts 1/700th of a second. [5] After making the capture, the spider typically bites the prey with venomous effect, and wraps it in the normal spider fashion with silk from the spinnerets.
The spider’s behavior was “surprising” but not entirely novel, he added, noting that some species of bolas spiders attracted male moths by producing chemicals that mimic female moth pheromones.
No, it's not a BBC Nature Video. It's a short video documenting the fight for survival between a bumble bee and a spider, and it's shot (and beautifully narrated) by London musician Keith John ...
Spiders have been used in studies which indicate that invertebrates may experience pain. Under natural conditions, orb-weaving spiders (Argiope spp.) undergo autotomy (self-amputation) if they are stung in a leg by wasps or bees. Under experimental conditions, when spiders were injected in the leg with bee or wasp venom, they shed this appendage.
The sex pheromones of female butterflies are mostly mono- or bis-olefinic fatty acids or their esters, fatty alcohols, their esters or the corresponding aldehydes. Male butterflies use a wide range of chemicals as sex pheromones, for example pyrrolizidine alkaloids, terpenes and aromatic compounds such as benzaldehyde.
More specifically, the male uses his silk to immobilize the female's legs I and II while he holds her legs III and IV. [9] Prior to mating, the male follows the female, periodically releasing his dragline (a line of spider silk). Slowly approaching the female from behind, the male traces the female's path until he reaches the female's hind legs.