▁Category : Mil it ary ▁units ▁and ▁form ations ▁established ▁in ▁ 1 9 1 7 ▁Category : Mil it ary ▁units ▁and ▁form ations ▁dis est ab lished ▁in ▁ 1 9 4 2 ▁ 3 0 8 <0x0A> </s> ▁The ▁New ▁Zealand ▁wr ens ▁ ▁are ▁a ▁family ▁( A can this itt idae ) ▁of ▁tiny ▁passer ines ▁en demic ▁to ▁New ▁Zealand . ▁They ▁were ▁represented ▁by ▁six ▁known ▁species ▁in ▁four ▁or ▁five ▁gener a , ▁although ▁only ▁two ▁species ▁surv ive ▁in ▁two ▁gener a ▁today . ▁They ▁are ▁understood ▁to ▁form ▁a ▁distinct ▁line age ▁within ▁the ▁passer ines , ▁but ▁authorities ▁differ ▁on ▁their ▁assignment ▁to ▁the ▁osc ines ▁or ▁sub osc ines ▁( the ▁two ▁sub orders ▁that ▁between ▁them ▁make ▁up ▁the ▁Pass er iformes ). ▁More ▁recent ▁studies ▁suggest ▁that ▁they ▁form ▁a ▁third , ▁most ▁ancient , ▁sub order ▁A can this itt i ▁and ▁have ▁no ▁living ▁close ▁relatives ▁at ▁all . ▁They ▁are ▁called ▁" wr ens " ▁due ▁to ▁similar ities ▁in ▁appearance ▁and ▁behaviour ▁to ▁the ▁true ▁wr ens ▁( T ro gl ody t idae ), ▁but ▁are ▁not ▁members ▁of ▁that ▁family . ▁ ▁New ▁Zealand ▁wr ens ▁are ▁mostly ▁insect iv orous ▁for agers ▁of ▁New ▁Zealand ' s ▁for ests , ▁with ▁one ▁species , ▁the ▁New ▁Zealand ▁rock ▁w ren , ▁being ▁restricted ▁to ▁al pine ▁areas . ▁Both ▁the ▁remaining ▁species ▁are ▁poor ▁f liers ▁and ▁four ▁of ▁the ▁five ▁ext