ens ▁Island ▁w ren , ▁Tra vers ia ▁l yal li Gen us ▁P ach y pl ich as ▁† St out - leg ged ▁w ren ▁or ▁Y ald win ' s ▁w ren , ▁P ach y pl ich as ▁y ald w yn i ▁ ▁† P ach y pl ich as ▁j ag mi Gen us ▁D end ro sc ans or ▁† Long - bil led ▁w ren , ▁D end ro sc ans or ▁dec ur vi ro str is Gen us ▁K ui orn is ' ▁† K ui orn is ▁indicator '' ▁ ▁Description ▁ ▁New ▁Zealand ▁wr ens ▁are ▁tiny ▁birds ; ▁the ▁rif le man ▁is ▁the ▁smallest ▁of ▁New ▁Zealand ' s ▁birds . ▁Their ▁length ▁ranges ▁from ▁ 7 ▁to ▁ 1 0   cm ▁and ▁their ▁weight ▁from ▁as ▁little ▁as ▁ 5 – 7 ▁g ▁for ▁the ▁rif le man ▁to ▁an ▁estimated ▁ 5 0 ▁g ▁for ▁the ▁ext inct ▁st out - leg ged ▁w ren . ▁The ▁New ▁Zealand ▁rock ▁w ren ▁( and ▁probably ▁the ▁bush w ren ) ▁we igh s ▁between ▁ 1 4 ▁and ▁ 2 2 ▁g ▁and ▁the ▁ext inct ▁long - bil led ▁w ren ▁we ighed ▁around ▁ 3 0 ▁g . ▁ ▁The ▁pl um age ▁of ▁the ▁New ▁Zealand ▁wr ens ▁is ▁only ▁known ▁for ▁the ▁four ▁species ▁seen ▁by ▁European ▁scient ists . ▁All ▁these ▁species ▁have ▁d ull ▁green ▁and ▁brown ▁pl um age