needs. Nectarivorous bats might be at particular risk of extinction due to their reliance on particular species of flowering plants.

A single marsupial species, the honey possum, feeds on nectar and pollen exclusively. It raises fewer young which grow more slowly than other marsupials of its size, because of the time-consuming effort of nectar-drinking from many flowers to support itself. It may spend periods in deep sleep to reduce its need for food, and shows the typical nectarivore adaptations