Moyenne Island

Moyenne Island National Park protects a small granitic island of approximately nine hectares located within the Sainte Anne Marine National Park, roughly four kilometers off the northeast coast of Mahé. The island was declared a national park in 2008, becoming the smallest national park in the Seychelles. For decades, Moyenne was the private domain of Brendon Grimshaw, an English newspaper editor who purchased the island in 1962 and spent over forty years transforming it from an abandoned coconut plantation into a thriving nature sanctuary. Grimshaw personally planted over 16,000 trees and introduced over 100 giant Aldabra tortoises to the island. Today the park offers visitors a unique combination of restored tropical forest, historic ruins, giant tortoises, and coral-fringed beaches within a short boat ride from Mahé.

Moyenne Island is home to a thriving population of over 100 Aldabra giant tortoises that roam freely across the island, many approaching visitors without hesitation. The island supports breeding populations of several native bird species including the Seychelles sunbird, Seychelles fody, and various seabirds that nest along the rocky shoreline. Moorhen and turtle doves are commonly observed in the island's interior. The surrounding coral reefs host diverse marine life including reef fish, sea turtles, and rays visible from the beaches. Fruit bats visit the island regularly, feeding on the diverse fruit trees planted during the restoration period. Skinks and geckos are abundant throughout the vegetation, and hermit crabs populate the shoreline and forest floor.

The vegetation on Moyenne represents a remarkable restoration success, having been transformed from a degraded coconut plantation to diverse tropical forest over several decades. Brendon Grimshaw planted native and endemic tree species including takamaka, badamier, and various palms that now form a substantial canopy. Fruit trees including mango, papaya, and breadfruit provide food for both wildlife and visitors. The understory has developed natural complexity with native ferns, shrubs, and ground cover establishing beneath the planted canopy. Coastal vegetation includes sea grape and casuarina along the shoreline, stabilizing the sandy and rocky margins. The island demonstrates what dedicated individual conservation effort can achieve in restoring degraded tropical island habitats.

Moyenne Island is composed of ancient granitic rock typical of the inner Seychelles islands, with exposed boulders and outcrops dating to the Precambrian period approximately 750 million years ago. The island's terrain is gently undulating, rising to a modest central hill that provides views across the Sainte Anne Marine Park. Weathered granite formations along the coastline create small coves, rock pools, and sheltered beaches. The soil is relatively thin over the granite bedrock, characteristic of small granitic islands in the Seychelles. Coral sand beaches form on the sheltered western side, while the eastern shore features more exposed rock. The geological connection between Moyenne and the other inner granitic islands reflects their shared origin as fragments of the ancient Gondwana supercontinent.

Moyenne Island experiences the same tropical maritime climate as nearby Mahé, with warm temperatures ranging from 24 to 31 degrees Celsius throughout the year. The northwest monsoon season from November through March brings warmer temperatures and higher rainfall, while the southeast trade wind season from May through September is somewhat cooler and drier. Average annual rainfall on the island is approximately 2,300 millimeters, with the wettest months typically being December and January. The island's small size means it lacks the orographic rainfall enhancement that occurs on larger mountainous islands like Mahé. Sea breezes moderate temperatures and provide natural ventilation. The calm waters between Moyenne and Mahé are generally sheltered, though crossings can become rough during the southeast monsoon.

Moyenne Island has a colorful history stretching back to the eighteenth century when it was reportedly used by pirates operating in the Indian Ocean, and persistent legends suggest buried treasure may still lie somewhere on the island. During the French colonial period, the island was used for small-scale agriculture including coconut and spice cultivation. The island passed through several owners during the British colonial era, with periods of abandonment allowing vegetation to degrade. In 1962, Brendon Grimshaw purchased the island for approximately 8,000 British pounds and dedicated the rest of his life to its ecological restoration. Grimshaw lived on the island with his Seychellois assistant René Lafortune, together creating one of the most remarkable private conservation projects in the Indian Ocean. Two mysterious graves of unknown origin on the island have fueled speculation about its pirate connections.

Brendon Grimshaw's decades-long campaign to protect Moyenne culminated in the island's designation as a national park in 2008, with Grimshaw donating the island to the nation through the Moyenne Island Foundation. The declaration recognized both the ecological value of the restored habitat and the cultural significance of Grimshaw's conservation legacy. Following Grimshaw's death in 2012 at age 86, management transitioned fully to the Moyenne Island Foundation and the Seychelles National Parks Authority. The park operates as a day-visit destination with structured access to protect the island's wildlife and vegetation. Conservation management continues the restoration work that Grimshaw began, maintaining the tortoise population and protecting nesting seabirds. The park serves as an educational example of what individual dedication to conservation can accomplish.

A network of short trails winds through the island's restored forest, allowing visitors to explore the full extent of Moyenne in roughly two hours. The giant Aldabra tortoises are the primary attraction, with many individuals habituated to human presence and approachable on the trails. Two historic graves of unknown origin near the center of the island are a point of curiosity and are linked to local pirate legends. Brendon Grimshaw's former residence provides context for understanding the island's modern history. The western beach offers swimming and snorkeling opportunities in sheltered waters with good visibility over coral and reef fish. A small chapel built by Grimshaw sits among the trees, reflecting his personal attachment to the island. Picnic areas are available near the beach for visitors arriving on day trips.

Moyenne Island is accessible only by boat from Mahé, with regular tour operators offering day trips that typically include the marine park and island visit. The boat journey from the Victoria Marine Charter jetty takes approximately 20 minutes. Visitors typically arrive as part of organized excursions that include snorkeling stops within the Sainte Anne Marine Park. A small visitor reception area provides basic information about the island's history and ecology. Simple dining facilities serve Creole lunches for tour groups, though visitors should confirm meal arrangements with their tour operator. No overnight accommodation is available on the island. An entrance fee supports the Moyenne Island Foundation's conservation work. The island has no jetty, so visitors wade ashore or are transferred by smaller boats depending on conditions.

The ongoing management of Moyenne Island focuses on maintaining the ecological gains achieved through Grimshaw's restoration work while managing visitor impacts. The Aldabra giant tortoise population requires monitoring to ensure the island's carrying capacity is not exceeded and that food resources remain adequate. Invasive species management continues, with periodic removal of non-native plants that could compete with the established native vegetation. Coral reef monitoring around the island tracks the health of surrounding marine habitats that form part of the broader Sainte Anne Marine National Park. Visitor numbers are managed to prevent overcrowding and disturbance to wildlife, particularly nesting seabirds. The Moyenne Island Foundation works to secure long-term funding for conservation through tourism revenue and donations. The island serves as a powerful demonstration site for tropical island restoration ecology.