Merja Zerga, also known as the Lagune de Moulay Bou Selham, is a tidal lagoon on Morocco’s Atlantic coast, located about 70 km north of Kenitra. Covering 4,500 hectares, it is one of the country’s most important wetlands. Classified as a Permanent Biological Reserve in 1978, it is jointly managed by several government agencies. The lagoon is internationally recognized as a Ramsar site and an Important Bird Area (IBA) due to its critical role in supporting migratory waterbirds along the East Atlantic Flyway.

Geography & Environment

The lagoon receives water from the Oued Drader and the local water table. With an average depth of 1.5 m, it is shallow but ecologically rich. Annual rainfall of 600–700 mm causes winter floods that inundate surrounding areas, replenishing the wetland ecosystem. Its tidal nature and seasonal flooding create diverse habitats for birds, fish, and aquatic vegetation.

Wildlife

Merja Zerga is a haven for birdlife:

• Wintering Populations: Between 15,000–30,000 ducks overwinter here, alongside 50,000–100,000 waders.

• Permanent Residents: Marsh owls are among the lagoon’s year-round inhabitants.

• Winter Visitors: Ruddy shelduck, common shelduck, gadwall, Eurasian wigeon, northern shoveler, marbled teal, greater flamingo, common coot, pied avocet, and grey plover.

• Extinct Species: Historically, the lagoon hosted the slender-billed curlew, now considered extinct.

The lagoon also supports fish and invertebrates, forming a vital food chain for migratory birds.

Surrounding Areas

Merja Zerga lies adjacent to the town of Moulay Bousselham, which provides access and services for visitors. The panoramic views of the lagoon from the town are a highlight, and the area blends ecological importance with cultural and tourism potential.

Activities

• Birdwatching: The lagoon is one of Morocco’s premier birdwatching sites, especially in winter.

• Photography: Capture large flocks of ducks, waders, and flamingos against tidal landscapes.

• Eco-Tours: Guided tours highlight the lagoon’s ecological significance and conservation efforts.

• Cultural Visits: Explore Moulay Bousselham, a fishing town with traditional Moroccan coastal life.

Best Time to Visit

• Winter (November–February): Peak bird migration, with tens of thousands of ducks and waders present.

• Spring (March–May): Mild weather and active birdlife, with lush vegetation.

• Summer (June–August): Hotter conditions, fewer migratory birds, but scenic lagoon views.

• Autumn (September–October): Transitional season with moderate temperatures and quieter tourism.

Visitor Tips

• Access: Easily reached from Kenitra or Rabat by road; Moulay Bousselham is the main gateway.

• Vehicles: Standard cars suffice; roads are accessible.

• Supplies: Bring binoculars, water, and snacks; facilities are limited.

• Clothing: Light wear for daytime, warm layers for evenings, and sun protection.

• Safety: Respect bird colonies and avoid disturbing sensitive wetland habitats.

• Community Support: Engage with local eco-tourism initiatives to support conservation and livelihoods.