The Ko Si Ko Ha archipelago, widely known as the "Bird's Nest Islands," is situated in the heart of the upper Songkhla Lake within the Ko Mak Sub-district of Pak Phayun, Phatthalung. Geologically, these islands are ancient limestone formations sculpted over millennia by wind and water, resulting in intricate cavern systems and majestic cliffs with stunning natural patterns. The group comprises several small islands, including Ko Si, Ko Ha, Ko Thai Tham, and Ko Ta Sai. Most of this area serves as one of Thailand’s most significant concessions for edible bird's nests. The pristine environment provides an ideal habitat for swiftlets, whose nests are globally acclaimed for their superior quality, purity, and high nutritional value, often referred to locally as the "White Gold of the Lake."

Historically, these islands hold immense royal significance, most notably marked by the visit of King Chulalongkorn (Rama V) in 1889. During his royal tour, the King observed the traditional bird's nest harvesting process and inscribed his royal initials "J.P.R." on the limestone walls of the Nang Aen Cave on Ko Ha. Today, a commemorative pavilion stands at the site where the King once stayed, serving as a landmark for visitors. Beyond its commercial and historical value, the archipelago is a biological hotspot located at the confluence of three water types (fresh, brackish, and salt water). This unique ecosystem supports a vast array of biodiversity, including the rare Irrawaddy dolphins and various endemic aquatic species.

The atmosphere surrounding the islands is characterized by a profound sense of tranquility and mystique. Visitors navigating the waters will encounter "Bird's Nest Houses"—small wooden huts perched precariously on cliffs and outcrops, inhabited by guards who protect the precious nests. A journey to Ko Si Ko Ha is more than a scenic boat ride; it is an immersive experience that weaves together natural grandeur, royal history, and the long-standing tradition of bird's nest concessions, all maintained under strict regulations to ensure the enduring sustainability of this unique ecosystem.

---

How to Get There

• Visitors can hire a long-tail boat at Pak Phayun Pier or Lampam Pier. The boat ride from Pak Phayun Pier takes approximately 20-30 minutes to reach the islands.

---

Travel Tips

• Book your boat in advance, especially on weekends and holidays

• Visit in the early morning or late afternoon for the best lighting and cooler weather

• Check the weather forecast as strong winds can cause rough waves

• Always wear a life jacket during the trip

---

Admission Fees:

• There is no entrance fee, but there is a boat rental fee. The price for a chartered longtail boat from a local starts at approximately 550 baht (for 5-8 people).

Opening Hours:

• Open for boat tours daily from 06:00 – 18:00.