NAKHON RATCHASIMA - Swarms of butterflies have returned to the shores of Lam Chae Dam reservoir, creating a striking natural display that is drawing visitors as the annual “butterfly season” begins.
After several days of rain followed by intense daytime heat, conditions have become ideal for butterflies emerging from Thap Lan National Park in Khon Buri district. Tens of thousands are now fluttering along newly exposed sandbanks stretching for kilometres at Kaeng Wang Won, near Ban Mab Krad in tambon Khok Krachae.
The sandbars have reappeared as the water level continues to fall, despite recent rainfall, as water is released to support downstream agriculture, especially off-season rice farming.
Along these sandy stretches, butterflies gather in dense clusters to feed on minerals in the soil - a behaviour known as “puddling”. Their vibrant colours and constant motion have turned the shoreline into a natural spectacle, attracting visitors seeking relief from the heat and to enjoy the scenic mountain views.
The area is surrounded by forested hills within the rich ecosystem of Thap Lan National Park. A survey by Suranaree University of Technology identified at least 25 butterfly species here, underscoring the site’s biodiversity.
Kampha Songkathok, president of the Lam Chae Dam rafting and boat operators’ club, said the mix of hot days and afternoon showers supports the insects’ life cycle.
“These conditions support their life cycle, so large numbers are now emerging and feeding along the sandy banks above the dam,” he said.
Butterflies can be seen from the waterways flowing out of the national park into the reservoir, clustering along sandbanks on both sides. Kaeng Wang Won, a rocky rapid with clear water, is a popular spot for both viewing and swimming.
Mr Kampha said large numbers of butterflies in various species and colours are on display, with the annual show expected to last until the end of the month.
Visitors must travel by boat from Ban Mab Krad pier in tambon Khok Krachae. The trip across the reservoir and through scenic valleys takes about 40 minutes, with local boats available for hire.
Boat trips typically cost 800 to 1,200 baht, carrying eight to 12 passengers.
