The giant nuthatch spends most of its time high up in trees where its highly dexterous feet allow it to move along trunks and branches with ease. It forages for insects and insect larvae, which constitute a major part of its diet, but it also feeds on any berries and nuts that it finds (8). Like most other nuthatches, it cannot excavate its own nesting cavities and so nests in natural cavities or old woodpecker nests (7).
All nuthatches are monogamous, mating for life. Courtship behaviour of the giant nuthatch begins in December, when five to eight males and females group together and forage for food as a unit. Courtship rituals involve a male following a female and offering food. If the female accepts the gift, the pair will separate from the group, mate and begin building a nest (7).
The female giant nuthatch remains in the nest while the male forages for food until the eggs are laid. The male and female then take it in turns to incubate the eggs while the other searches for food, but once the eggs hatch it is necessary for both parents to forage to provide sufficient food for the nestlings. The young giant nuthatches leave the nest at about 25 days old (7).