Milkweed butterflies, known for their spectacular biannual migrations across the Indian peninsula, give Bengaluru a ringside view in June, according to a report by Ramya Coushik.
Migration Pattern and Timing
The butterflies undertake two major migrations each year. The northward migration occurs from March to June, while the southward migration happens from October to December. In June, Bengaluru witnesses a peak in butterfly activity as they pass through the city.
These migrations are driven by seasonal changes and the need to find suitable breeding grounds. Milkweed butterflies rely on host plants from the Asclepiadaceae family for laying eggs.
Species Involved
Several species of milkweed butterflies participate in these migrations, including the Plain Tiger (Danaus chrysippus), Striped Tiger (Danaus genutia), and Blue Tiger (Tirumala limniace). These butterflies are easily identifiable by their striking orange, black, and white patterns.
Impact on Bengaluru
For residents of Bengaluru, June offers a unique opportunity to observe thousands of butterflies moving through gardens, parks, and even urban areas. The phenomenon attracts nature enthusiasts and researchers alike.
According to Ramya Coushik, the migration is a reminder of the ecological significance of preserving green corridors and native plants in cities. The butterflies' journey spans hundreds of kilometers, and their presence indicates a healthy environment.
Conservation Concerns
Urbanization and habitat loss pose threats to these migratory routes. Conservationists urge the planting of milkweed and other nectar-rich plants to support the butterflies during their journey.
As climate patterns shift, the timing and routes of migrations may also change, requiring ongoing monitoring. The spectacle in Bengaluru underscores the need for citizen science initiatives to track butterfly populations.
