▁of ▁S ask atch ew an . ▁ ▁Status ▁and ▁conservation ▁These ▁birds ▁are ▁decl ining ▁in ▁numbers ▁and ▁range ▁due ▁to ▁habitat ▁loss , ▁but ▁overall ▁they ▁are ▁not ▁considered ▁a ▁threatened ▁species . ▁ ▁Notes ▁ ▁References ▁Ald rich , ▁J . W . ▁ 1 9 6 3 . ▁Geographic ▁orientation ▁of ▁American ▁T etra on idae . ▁Journal ▁of ▁Wild life ▁Management ▁ 2 7 : ▁ 5 2 9 - 5 4 5 . ▁Am mann , ▁G . A . ▁ 1 9 5 7 . ▁The ▁pra irie ▁gr ouse ▁of ▁Michigan . ▁Michigan ▁Department ▁of ▁Conserv ation ▁technical ▁bullet in . ▁Ben k obi , ▁L ., ▁D . W . ▁U res k , ▁G . ▁Sch en beck , ▁and ▁R . ▁M . ▁King . ▁ 2 0 0 0 . ▁Pro tocol ▁for ▁Mon itor ing ▁Stand ing ▁C rop ▁in ▁Gr ass lands ▁Using ▁Visual ▁Ob st ruction . ▁Journal ▁of ▁Range ▁Management , ▁Vol . ▁ 5 3 , ▁No . ▁ 6 , ▁pp .   6 2 7 – 6 3 3 ▁Ber ger , ▁R . P ., ▁and ▁R . K . ▁Bay d ack . ▁ 1 9 9 2 ▁Effect s ▁of ▁as pen ▁succession ▁on ▁sharp - ta iled ▁gr ouse , ▁T ym pan uch us ▁ph as ian ell us . ▁In ▁the ▁inter la ke ▁region ▁of ▁Man it oba . ▁Canadian ▁Field ▁natural ist ▁ 1 0 6