▁to ▁between ▁ 1 - 3 ▁eggs ▁in ▁a ▁nest . ▁ ▁Th re ats ▁ ▁R uf ous - ta iled ▁ha w ks ▁are ▁threatened ▁by ▁many ▁factors , ▁especially ▁habitat ▁loss . ▁R uf ous - ta iled ▁ha w ks ▁have ▁been ▁losing ▁their ▁habitat ▁because ▁of ▁logging , ▁over ▁gra zing ▁by ▁sheep ▁and ▁cattle , ▁and ▁the ▁growth ▁of ▁P inus ▁and ▁Eu cal y pt us ▁plant ations . ▁P inus ▁radi ata ▁and ▁Eu cal y pt us ▁glob ulus ▁are ▁fast - g row ing ▁invas ive ▁plants ▁that ▁were ▁introduced ▁in ▁order ▁to ▁sp ur ▁the ▁tim ber ▁industry ▁in ▁Chile . ▁The ▁other ▁main ▁threat ▁to ▁r uf ous - ta iled ▁ha w ks ▁are ▁local ▁people , ▁who ▁sometimes ▁kill ▁these ▁birds ▁because ▁r uf ous - ta iled ▁ha w ks ▁attack ▁and ▁eat ▁their ▁domestic ated ▁animals . ▁ ▁Population ▁estimates ▁ ▁Fer g us on - Le es ▁and ▁Christ ie ▁( 2 0 0 1 ) ▁estimated ▁the ▁population ▁size ▁to ▁be ▁around ▁ 1 0 0 ▁individuals . ▁In ▁ 2 0 0 1 , ▁the ▁IU CN ▁ranked ▁them ▁at ▁only ▁" low ▁risk ". ▁They ▁were ▁only ▁listed ▁as ▁" v ul ner able " ▁in ▁ 2 0 1 5 ▁because ▁the ▁IU CN ▁estimated ▁the ▁population ▁to ▁be ▁around ▁ 2 9 9 - 9 9 9 ▁m ature ▁individuals ▁and ▁a ▁total ▁of ▁around ▁ 3 7 5 - 1