Once widespread and abundant, the tammar wallaby’s range has severely contracted, but it is still common in remaining areas of habitat along the southern coast of South and Western Australia, and some offshore islands. They are a nocturnal species but will begin to move and forage at dusk ensuring they do not leave the scrub until after dark. Tammar wallabies living in semi-arid habitats are amazingly able to drink sea water when fresh water is unavailable.
The tammar wallaby is a herbivorous species, feeding mostly on grasses, and sometimes leaves of shrubs.
Female tammar wallabies become mature at about nine months old while they are still suckling, while males do not become mature until nearly 2 years old. They will have 1 offspring which spends 8-9 months in the pouch before maturing.