What is the Merja Zerga lagoon at Moulay Bousselham and why do birders love it?

Merja Zerga is my go-to wetland for serious birdwatchers, and the easiest one to reach from the main Rabat–Tangier axis. It's a broad tidal lagoon on the Atlantic coast beside the laid-back village of Moulay Bousselham, protected as a Ramsar site of international importance. Twice a day the tide breathes in and out of the lagoon, exposing mudflats that become a vast open-air banquet for birds.

The numbers are what make it special. In winter the lagoon holds tens of thousands of waders and wildfowl, and the cast list reads like a birder's wish-list: greater flamingos in shimmering pink ranks, spoonbills, avocets, terns, and the scarce slender-billed gull. Ornithologists travel a long way for this place, because the density and variety on a good winter morning rival anywhere in North Africa.

The classic way to experience it is by boat. The village fishermen run small flat-bottomed boats out across the lagoon, and a local guide who knows the birds will pole you quietly toward the flocks at the right state of the tide. Drifting out at dawn with mist on the water and flamingos lifting off around you is one of those gentle, unhurried Moroccan mornings I wish more travellers made time for.

Practically, Moulay Bousselham is an easy drive north of Rabat or south of Tangier/Larache, which makes Merja Zerga a brilliant half-day on a coastal route — no 4x4 or expedition needed. I time visits for winter and early spring when the migrant numbers peak, go for the morning, and arrange a knowledgeable boatman rather than just any pole-pusher. Bring binoculars; the difference they make to the experience is enormous.