Thousands of butterflies have been spotted flying in large groups across several parts of Sri Lanka, including Colombo, Galle and Ratnapura, attracting widespread attention on social media.
According to experts, this is a natural seasonal migration linked to monsoon rainfall and the growth of host plants that provide food and breeding grounds for butterflies.
Species such as the Lesser Albatross, Common Albatross and Lemon Emigrant are among those involved in the migration. They move across the island in search of food, suitable breeding areas and mates.
Researchers say Sri Lanka’s main butterfly migration season occurs between October and December, during the second inter-monsoon period.
Experts also explain that butterflies often gather around mountain peaks, including Sri Pada (Adam’s Peak), in a behaviour known as hill-topping, which helps them find mates.
The mass movement of butterflies is not a scientific indicator or warning of an impending natural disaster. However, butterflies are sensitive to changes in weather conditions, including wind, temperature and atmospheric pressure.
