, ▁as ▁part ▁of ▁the ▁fight - or - fl ight ▁response , ▁or ▁to ▁show ▁domin ance ▁over ▁sub ordinate ▁animals . ▁R ais ing ▁the ▁hack les ▁causes ▁the ▁animal ▁to ▁appear ▁larger , ▁and ▁acts ▁as ▁a ▁visual ▁warning ▁to ▁other ▁animals . ▁R ais ed ▁hack les ▁are ▁used ▁by ▁grey ▁wol ves ▁as ▁a ▁domin ance ▁behavior , ▁by ▁mo ose ▁prepar ing ▁to ▁attack , ▁and ▁by ▁c ats ▁and ▁strip ed ▁hy ena ▁which ▁are ▁fear ful ▁or ▁threatened . ▁The ▁process ▁by ▁which ▁the ▁hair ▁is ▁raised ▁is ▁called ▁p ilo ere ction . ▁The ▁contra ction ▁of ▁the ▁ar rect or ▁p ili ▁mus cle ▁associated ▁with ▁each ▁hair ▁fol lic le ▁causes ▁the ▁hair ▁to ▁become ▁ere ct . ▁ ▁References ▁ ▁Category : Fe athers ▁Category : An imal ▁hair <0x0A> </s> ▁Ar ct ical ym ene ▁is ▁a ▁genus ▁of ▁tr il ob ites ▁found ▁in ▁Sil ur ian - aged ▁marine ▁str ata ▁of ▁Ar ctic ▁Canada ▁and ▁Central ▁Victoria , ▁Australia . ▁ ▁The ▁Canadian ▁species ▁are ▁named ▁after ▁each ▁of ▁the ▁Sex ▁P ist ols : ▁A . ▁cook i ▁( Paul ▁Cook ), ▁A . ▁j ones i ▁( Ste ve ▁Jones ), ▁A . ▁mat lock i ▁( G len ▁Mat lock ), ▁A . ▁ro tt eni ▁( John ny ▁Rotten ) ▁and ▁A . ▁v icious i ▁( S id ▁V icious ), ▁all ▁named ▁by ▁Ad rian ▁and ▁Edge com be ▁in ▁