▁ ▁Description ▁ ▁The ▁Cass ia ▁cross b ill ▁shares ▁many ▁physical ▁features ▁with ▁the ▁red ▁cross b ill ▁and ▁all ▁of ▁its ▁different ▁call ▁types . ▁Ad ult ▁males ▁display ▁a ▁brick ▁red ▁pl um age ▁along ▁its ▁crown , ▁breast , ▁and ▁bel ly , ▁while ▁its ▁flight ▁fe athers ▁have ▁a ▁brown ▁colour . ▁In ▁contrast , ▁adult ▁females ▁have ▁an ▁overall ▁d ull ▁green ▁or ▁o live - yellow ▁colour , ▁with ▁brown ▁flight ▁fe athers . ▁Its ▁defining ▁feature , ▁a ▁crossed ▁bill , ▁is ▁a ▁cr iss cross ed ▁bill ▁used ▁to ▁access ▁the ▁p ine ▁cone ▁se eds . ▁However , ▁in ▁relation ▁to ▁the ▁red ▁cross b ill ▁call ▁types , ▁the ▁Cass ia ▁cross b ill ▁has ▁a ▁deeper ▁and ▁th icker ▁bill ▁to ▁crack ▁open ▁the ▁harder ▁p ine ▁con es ▁in ▁its ▁habitat . ▁Its ▁body ▁mass ▁ranges ▁from ▁ 2 9 . 2 – 4 3 . 9 ▁g , ▁while ▁its ▁wing ▁length ▁ 8 5 . 0 – 1 0 0 . 0   mm ▁and ▁bill ▁depth ▁ 8 . 9 0 – 1 0 . 5 6   mm . ▁ ▁Hab itat ▁and ▁distribution ▁The ▁Cass ia ▁cross b ill ▁is ▁found ▁year - round ▁exclus ively ▁in ▁the ▁for ests ▁of ▁the ▁South ▁Hills ▁and ▁Alb ion ▁Mountains ▁in ▁South ▁Id aho . ▁Comp ared ▁to ▁its ▁counter part , ▁the ▁red ▁cross b ill , ▁which ▁is ▁a ▁global ▁species , ▁the ▁total ▁area