al ▁cr ick eters ▁Category : C rick eters ▁from ▁Kol k ata <0x0A> </s> ▁The ▁R uf ous - ta iled ▁ha w k ▁( B ute o ▁vent ral is ) ▁is ▁a ▁species ▁of ▁bird ▁of ▁pre y ▁in ▁the ▁family ▁Ac cip it r idae . ▁ ▁The ▁r uf ous - ta iled ▁ha w k ▁is ▁found ▁in ▁southern ▁Argentina ▁and ▁Chile , ▁including ▁the ▁entire ▁region ▁of ▁T ierra ▁del ▁Fu ego . ▁Its ▁natural ▁habit ats ▁are ▁temper ate ▁for ests , ▁subt rop ical ▁or ▁tropical ▁dry ▁shr ub land , ▁subt rop ical ▁or ▁tropical ▁high - alt itude ▁shr ub land , ▁and ▁temper ate ▁grass land . ▁ ▁Description ▁ ▁The ▁r uf ous - ta iled ▁ha w k ▁is ▁similar ▁to ▁the ▁red - ta iled ▁ha w k . ▁It ▁was ▁first ▁recorded ▁by ▁Charles ▁Dar win ▁in ▁Pat ag onia ▁while ▁on ▁his ▁voyage ▁of ▁the ▁Be agle . ▁The ▁r uf ous - ta iled ▁ha w k ▁is ▁a ▁medium - s ized ▁ha w k ▁with ▁a ▁wing ▁span ▁of ▁ 4 5 – 6 0   cm . ▁The ▁overall ▁size ▁range ▁of ▁the ▁ha w k ▁is ▁ 5 4 – 6 0   cm . ▁ ▁There ▁are ▁two ▁different ▁color ations ▁of ▁the ▁r uf ous - ta iled ▁ha w k . ▁The ▁more ▁common ▁pale ▁version ▁of ▁the ▁ha w k ▁has ▁a ▁black ish ▁brown ▁upper ▁parts