 The female is easily distinguished from the male : she has a more narrow and less domed head , her beak is narrower and proportionally longer , her <unk> and nostrils smaller , her legs and feet more slender and pinkish grey , and her tail proportionally longer . While her plumage colour is not very different from that of the male , the <unk> is more subtle , with less yellow and <unk> . She tends to resist more and be more aggressive than the male when handled . A nesting female also has a brood patch on the bare skin of the belly . 
