Chennai has about 150 kinds of butterflies, and the best months to see them are June to September, when sunny spells between rain showers bring out the biggest numbers, according to naturalists quoted by Citizen Matters. A field guide written by ten Chennai butterfly watchers and reviewed in Sanctuary Asia in December 2023 lists 157 species for the city and its surroundings.
For a city this built up, that is a good number. The state as a whole has 326 recorded butterfly species in a Forest Department compilation, Roundglass Sustain reported, so Chennai holds close to half. The northeast monsoon has now set in, but butterflies remain active on bright days through the season. Here is what to look for, where, and how to bring a few to your balcony.
Species you are most likely to see
Most of what flutters past a Chennai window belongs to a short list of common, adaptable species. Watchers interviewed by Citizen Matters named these among the most frequent:
- Common Emigrant and Common Grass Yellow: pale yellow or lemon butterflies that fly fast and low, often in numbers.
- Plain Tiger: orange with black-and-white wing tips, slow flying, common in gardens.
- Tawny Coaster: a small orange butterfly with a weak, floating flight.
- Lime Swallowtail: black and yellow with a chequered pattern, frequent around citrus plants.
- Flame Tiger and the Small Salmon Arab, the latter noted at Adyar Poonga.
Rarer visitors mentioned include the Southern Birdwing, India’s largest butterfly, which has been seen at the Madras Crocodile Bank, along with the Blue Mormon, Common Mime, Painted Lady and Spot Swordtail. Do not expect the Tamil Yeoman, Tamil Nadu’s state butterfly since 2019; Roundglass notes it is a Western Ghats species of moist forests and streams.
Where to look in the city
Butterflies follow flowering and food plants, so older campuses and parks with mixed native vegetation beat manicured lawns.
| Place | What has been reported |
|---|---|
| Guindy National Park | About 120 of the city’s roughly 150 species, per naturalists cited by Citizen Matters |
| Nanmangalam Reserve Forest | About 40 species in a Care Earth Trust study (entry needs permission) |
| Semmozhi Poonga, Nageswara Rao Park, Anna Nagar Tower Park | At least 50 species between them |
| Adyar Poonga | Known for the Small Salmon Arab |
| IIT Madras, Madras Christian College, Theosophical Society, Kalakshetra | Named as urban-forest hotspots (campus access rules apply) |
Guindy has a long research record. A 1995 paper in the Journal of the Bombay Natural History Society studied butterfly populations at Guindy National Park, and the state tourism department lists the 2.7 sq km park among the city’s main nature sites, with October to May as the best visiting season. The Nanmangalam figure comes from a study cited by Citizen Matters.
When to go
- Season: June to September is the peak. Numbers stay healthy into the northeast monsoon on dry, sunny days.
- Time of day: Mid-morning, once the sun has warmed the air. Butterflies need warmth to fly and are sluggish at dawn.
- After rain: The first sunny day after heavy rain often brings the biggest burst of activity, and wet mud draws butterflies that sip minerals from it.
- September: Butterfly Month in India, when groups organise counts and walks.
- Dry spells: Numbers thin out in the hottest weeks of April and May, when many plants stop flowering.
Plants for a balcony or terrace
A butterfly needs two kinds of plants: nectar flowers for the adult and host plants on which it lays eggs and caterpillars feed. Chennai horticulturist B. Elango, quoted by Citizen Matters, recommended native hibiscus, thumbai and ixora as easy pot plants for balconies and window sills. Citrus plants such as a potted lemon draw Lime Swallowtails.
- Mix nectar and host plants and keep a few pots in sun for most of the day.
- Accept chewed leaves. Caterpillars eating your plants is the point.
- Skip pesticides. Even mild sprays kill caterpillars.
- Add a wet sand tray. A shallow dish of damp sand with a pinch of salt imitates the mud-puddles butterflies visit.
- Buy saplings locally. The Forest Department’s Dial A Tree portal lists seedlings at government nurseries, including lemon, neem, pongam and jamun, with home delivery in the Chennai area.
The Sanctuary review says the Chennai field guide gives host and nectar plants for each species, along with Tamil names, which makes it a good next step for anyone planning a butterfly garden.
Quick answers
How many butterfly species are there in Chennai?
About 150 by naturalists’ estimates; a 2023 field guide lists 157.
When is butterfly season in Chennai?
June to September is the peak, with good activity on sunny days during the monsoon.
What is the best place to see butterflies in Chennai?
Guindy National Park, where naturalists report about 120 species.
What should I plant to attract butterflies?
Native hibiscus, thumbai and ixora for nectar, and citrus as a host plant for swallowtails.
Information checked against official sources on 18 October 2026. Fees, dates and rules can change; confirm on the linked official pages before acting.
Sources
- Chennai is home to nearly 150 species of butterflies (Citizen Matters)
- Book review: Butterflies of Chennai, a comprehensive field guide (Sanctuary Asia)
- The Tamilian Warrior is now a state butterfly (Roundglass Sustain)
- A study on butterfly populations at Guindy National Park, Madras (JBNHS, 1995, via Biodiversity Heritage Library)
- Guindy National Park (Tamil Nadu Tourism)
- Dial A Tree nursery portal (Green Tamil Nadu Mission)
- Inside Nanmangalam Reserve Forest (Citizen Matters)
