Table 1.

Study species information.

species	common name	primary diet	feeding mode
Nymphicus hollandicus	cockatiel	small seeds from native or cultivated plants	beak only
Melopsittacus undulatus	budgerigar	small seeds of grass tussocks	beak only
Eolophus roseicapilla	galah	small seeds of native or cultivated grasses	beak and foot
Callocephalon fimbriatum	gang-gang cockatoo	large seeds of native trees	beak and foot
Calyptorhynchus banksii	red-tailed black cockatoo	large seeds of native trees	beak and foot
Cacatua galerita	sulphur-crested cockatoo	large seeds, nuts and bulbs	beak and foot
Alisterus scapularis	Australian king parrot	large seeds, berries, fruits and nuts	beak and foot
Polytelis swainsonii	superb parrot	large seeds, eucalyptus blossoms and fruits	beak and foot