- eared ▁c uck oo ▁( Ch rys oc oc cy x ▁osc ul ans ). ▁ ▁Diet ▁and ▁For aging ▁It ▁fe eds ▁on ▁the ▁ground , ▁often ▁in ▁the ▁company ▁of ▁other ▁birds ▁( m ixed ▁species ▁f lock s ), ▁such ▁as ▁the ▁buff - r ump ed ▁th orn b ill ▁( A can th iza ▁reg ulo ides ), ▁eastern ▁yellow ▁ro bin ▁( E ops alt ria ▁austral is ), ▁white - brow ed ▁scr ub w ren ▁( Ser ic orn is ▁front alis ), ▁sp otted ▁p ard al ote ▁( P ard al ot us ▁pun ct atus ), ▁we eb ill ▁( Sm ic ror nis ▁bre vi ro str is ), ▁and ▁silver - ey e ▁( Z oster ops ▁later alis ). ▁It ▁is ▁mainly ▁insect iv orous , ▁but ▁occasionally ▁e ats ▁se eds . ▁Its ▁chief ▁pre y ▁are ▁be et les ▁( C ole optera ), ▁was ps ▁and ▁wing ed ▁an ts ▁( H ymen optera ), ▁moth ▁and ▁but ter fly ▁lar va e ▁( L ep id optera ), ▁mant ids ▁and ▁grass ho ppers ▁( Or th optera ). ▁ ▁Conserv ation ▁status ▁ ▁Although ▁relatively ▁abund ant ▁with ▁a ▁population ▁estimated ▁at ▁ 4 0 0 , 0 0 0 , ▁the ▁spe ck led ▁war b ler ▁appears ▁to ▁be ▁decl ining ▁within ▁its ▁range . ▁Th re ats ▁include ▁land ▁clear ance , ▁leading ▁to ▁the ▁advent ▁of ▁invas ive ▁we