▁they ▁give ▁each ▁lim b ▁the ▁appearance ▁of ▁the ▁fore leg ▁of ▁a ▁Var an id ▁L izard . ▁The ▁to es ▁are ▁long ▁and ▁gra cile ▁and ▁like ▁other ▁pe af ow ls , ▁the ▁h ind ▁toe ▁is ▁less ▁rec umb ent ▁than ▁those ▁of ▁more ▁strictly ▁terrest rial ▁Gall iformes . ▁ ▁Be hav iour ▁and ▁e col ogy ▁ ▁Little ▁is ▁known ▁about ▁this ▁species ▁in ▁the ▁wild . ▁A ▁sh y ▁and ▁el us ive ▁bird , ▁the ▁cr ested ▁arg us ▁is ▁found ▁in ▁subm ont ane ▁primary ▁for ests ▁of ▁Vietnam , ▁La os ▁and ▁Malays ia ▁in ▁S out heast ▁Asia . ▁The ▁di et ▁consists ▁mainly ▁of ▁in verte br ates , ▁m oll us ks , ▁am ph ib ians , ▁small ▁re pt iles , ▁b am bo o ▁sho ots , ▁leaves , ▁f ruits ▁and ▁fung i . ▁Little ▁is ▁known ▁about ▁its ▁re product ive ▁strategy . ▁While ▁it ▁is ▁believed ▁by ▁some ▁authorities ▁to ▁be ▁pol yg am ous , ▁there ▁is ▁no ▁direct ▁evidence ▁to ▁subst anti ate ▁this ▁theory . ▁Natural ist ▁William ▁Be eb e ▁documented ▁pairs ▁of ▁cr ested ▁arg us ▁flying ▁to ▁and ▁from ▁the ▁over story . ▁This ▁suggests ▁that ▁there ▁may ▁be ▁in defin ite ▁pair ▁b onds . ▁There ▁is ▁marked ▁delayed ▁m atur ity ▁in ▁both ▁species . ▁They ▁appear ▁to ▁be ▁fully ▁adult ▁only ▁in ▁their ▁fifth ▁or ▁sixth ▁year . ▁ ▁The ▁male ▁performs ▁various ▁displays ▁that