Baudin's black cockatoo generally lives in pairs or small groups in summer, often forming permanent pairs, but may congregate in large flocks during winter (6) (7). In summer, the birds mostly confine themselves to karri and marri forests, where they nest in hollows or the main trunk of old, large eucalypt trees (7) (9). A clutch of one to two eggs is laid by the female and incubated for about four weeks (7). Only one chick usually survives to fledge (2) (11), leaving the nest after around 90 days (7). In forested areas, Baudin's black cockatoos mainly feed on the seeds of marri and karri (7) (10). They are also fond of ripping timber apart to get at large, wood-boring grubs, and apple and pear orchards are frequently raided for the seeds of their fruit (7) (10).
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