The grey-headed and black flying-foxes, otherwise known as fruit bats, are common in the Royal Botanic Gardens. Flying foxes are nocturnal mammals that can be seen roosting in the trees in the middle of the day. The grey-headed flying foxes have the largest body size of all bats with a maximum wingspan of one metre. They like to eat the nectar and pollen of eucalypts and other native trees, such as paperbarks and banksias. They also like eating rainforest fruits, such as figs and lilly pilly berries. The colony is damaging rare trees here and there are now plans to relocate them at great cost.