The common grass yellow is a small pierid butterfly species. It is found in Asia, Africa and Australia. They are found flying close to the ground and are found in open grass and scrub habitats. It is simply known as “the grass yellow”. The common grass yellow exhibits seasonal polyphenism. The lepidopteran has a darker summer morph, triggered by a long day exceeding 13hrs in duration while the shorter diurnal period of 12hrs or less induces a fairer morph in the post-monsoon period. The common grass yellow feeds on a variety of leguminosae. 

The Common Grass Yellow (Eurema hecabe) is a small to medium-sized butterfly with a bright yellow appearance, commonly found across South Asia, Southeast Asia, and parts of Australia. It is one of the most widespread yellow butterflies.

Common Grass Yellows are known for their fluttering, erratic flight, often seen in open fields, gardens, meadows, and grassy habitats. They are particularly active in sunny weather and can sometimes be found feeding on small flowers or puddling on moist soil.