The Tawny Coster (Acraea terpsicore) is a small leathery winged butterfly which is common in grassland and scrub habitats. It belongs to the Nymphalidae or brush-footed butterfly family. It has a weak fluttery flight. It is avoided by most insect predators. This species and the Yellow Coster Acraea issoria are the only two Indian representatives of the predominantly African tribe Acraeini.
The butterfly is found in India and Sri Lanka. It is common all the year round and is equally at home in forest clearings and open country. Though mainly seen at low elevations it has been recorded at heights of up to 7,000 feet (2,100 m) in south India and sometimes in the North
This is a butterfly of the hills as well as the plains. It is plentiful in the pre-monsoon and monsoon period and becomes scarce later on.
The butterfly exudes an oily and smelly yellow liquid when handled and is unpalatable to birds and most insects. They are well protected and have a slow and weak flight, frequently visiting flowers and are easily netted. There are no mimics in India.