Despite this shift, urticating hairs nonetheless retain unique characteristics that render them visually distinct from abdominal bristles, such as their tendency to cover only a portion instead of the entirety of the opisthosoma. This is thought to discourage fly larvae from consuming their eggs and young. Males of this species only live 3 or 4 years but the females can live up to as long as 14 years. Then wear eye protection, Photo of urticating hairs from T. blondi in a human eye. Michigan State University Extension Bulletin E-2700, April 1999, Chao-Kai Hsu, Mark Ming-Long Hsur, Rick C. West, Yau-I Chu: Skin Injury Caused by Urticating Hair of Tarantula. Generally they are relatively harmless. Many New World tarantulas (those from the Americas) possess specialised hairs known as urticating hairs. Its her trying to get you to stop picking her up. It’s also important to remember that tarantulas will often kick hairs around their enclosures, even if you don’t see them do it. Fully grown adult specimens reach about 10 to 11 inches in legspan, making them an absolute unit of a tarantula. Generally most bristles are only irritating, but some are dangerous to the eyes and respiratory tract, and some can cause severe skin necrosis and shedding. You can often tell when a tarantula doesn’t want to be disturbed, and you can often clearly see when they kick hairs. Contact with the skin can lead to intense … Urticating hairs are intended to be a deterrent for predators. Common presenting symptoms of ocular injury from tarantula hairs include conjunctival injection, foreign body sensation, periorbital facial rash, photophobia, and tearing. And while they're generally docile, curly hair tarantulas also might bite to defend themselves. There are seven different types of urticating hair known in tarantulas, varying in size and shape, particularly the distribution of barbs.[11]. They are located on the pedipalps. [17], Human reactions to urticating hair contact. They are loosely attached so that they easily break off when “kicked”, and are covered in barbs. Unfortunately there is no way to know for sure if you’ll be allergic if you’ve not come into contact with them before, so take extra care the first time dealing with any new world species known to kick hairs. In humans, urticating hairs can cause allergic skin reactions which can manifest as inflammation, rash and itching. Urticating hairs are a defense mechanism used by tarantulas. Type II urticating hairs can be found in the genera Avicularia, Iridopelma and Pachistopelma (subfamily Aviculariinae). TEMPERAMENT: Most members of this species are docile and easily handleable. However, many species whose larvae are armed with such bristles have behavioral patterns adapted to present the urticating hairs as a defensive threat and to inflict them on any perceived attackers. They are most commonly present on the abdomen of the spider. The most common form of urticating hairs in plants are typified by nettles, which possess sharp-pointed hollow bristles seated on a gland that secretes an acrid fluid. September 2007, S. 232-237, "Morphology, evolution and usage of urticating setae by tarantulas (Araneae: Theraphosidae)", United States Environmental Protection Agency, Institute of Food and Agricultural Sciences, https://en.wikipedia.org/w/index.php?title=Urticating_hair&oldid=1000310377, All articles with specifically marked weasel-worded phrases, Articles with specifically marked weasel-worded phrases from January 2010, Creative Commons Attribution-ShareAlike License, This page was last edited on 14 January 2021, at 16:04. They can kick hairs off their abdomens that can irritate a person's skin and cause damage if they get in your eyes. In serious cases they can embed themselves into the cornea causing severe pain and long term problems which will require medical attention, so eye protections is advised. Adults of some species also have urticating scales, and some species shed some of their urticating hairs as defense for their pupae and eggs. Type I and III urticating hairs are representative on a wide diversity of large bodied genera in the subfamily Theraphosinae Lasiodora and Acanthoscurria Nhandu spp., Megaphobema spp., Sericopelma spp., Eupalaestrus spp., Proshapalopus spp., Brachypelma spp., Cyrtopholis spp., and others, although some only have Type I in mature males. The latest studies[which?] ; Guimarães, Jorge A. McCullough, Deborah G., Raffa Kenneth A., Chris Williamson R. Natural Enemies of Gypsy Moth: The Good Guys. The reaction typically varies from person to person, anywhere from a … irritating hairs, are one of the primary defense mechanisms used by numerous plants, almost all New World tarantulas, and various lepidopteran caterpillars. My B. smithi will often kick hairs as soon as the lid comes off her enclosure, and when that happens the best bet is to keep your distance. Mine is very slow moving and will sit still in my hand forever. May kick hairs but typically calms down after a minute. Usually they grab them in their beaks and scrub them on the ground till the majority of the bristles have been stripped or damaged, but at least some species of cuckoos apparently collect the bristles in the digestive tract until they form pellets that can be regurgitated.
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