galerita in the Turakina Valley decreased the proportion of time spent feeding, instead increasing time spent resting. Despite greater energetic demands in winter, C. By congregating in this area they reduced the amount of time needed to forage for food especially time spent flying (the most energetically costly behaviour). galerita from large area (probably hundreds of square kilometres) congregated into a large flock, roosting in a reserve immediately adjacent to fields of maize, their main food source at this time. galerita was strongly influenced by the availability of crop seed mostly maize (Zea maize). galerita distribution and the range of this species. Observed daily and seasonal differences in the movement, time-activity budget, habitat use and diet of cockatoos in a population stronghold (Turakina Valley, Manawatu-Wanganui Region) were used to provide insight into the relationship between the environmental factors characteristic of C. Instead distribution was best defined by a combination of temperature, availability of cultivated land and in New Zealand the presence of open woodland vegetation. galerita distribution in New Zealand falls within the range of ambient temperature experienced by this species in Australia, models of distribution produced from multiple logistic regression revealed temperature was not the only characteristic important in defining distribution. galerita in Australia and New Zealand was modelled against environmental factors using multiple logistic regression to determine which characteristics of its environment are important in defining their distribution. galerita that have appeared over more recent years is uncertain. Original colonies are thought to have established from escaped cage birds, but the origin of populations of C.
roseicapilla) have established in the South Auckland Region of the North Island. Sulphur-crested cockatoos (Cacatua galerita) have colonised several sites in the North Island and on Banks Peninsula in the South Island of New Zealand.
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