Merja Zerga Biological Reserve

Where the Sebou River delta meets the Atlantic, shallow lagoons and salt marshes create one of North Africa's most vital wetland systems. Merja Zerga—the name itself means "blue lagoon"—sprawls across thousands of hectares of brackish water, reed beds, and coastal flats in the Rabat-Salé-Kénitra region, shaped by the Mediterranean climate's rhythm of wet winters and bone-dry summers. The reserve's ecological character is defined by this seasonal pulse: winter rains flood the basins, freshening the lagoons and triggering a flush of plant growth, while summer drought concentrates salts and draws down water levels, exposing mudflats that become feeding grounds for waders and shorebirds. The vegetation shifts with salinity and water depth—halophytic plants tolerant of salt stress dominate the marshes, giving way to reed thickets where freshwater seeps in, while scrubby shrubland fringes the reserve's margins. This mosaic of habitats sustains populations of wading birds, diving ducks, and fish-eating waterbirds year-round, alongside migratory flocks that use the lagoons as critical refuelling stops during their journeys across the Atlantic-Mediterranean flyway. Raptors hunt over the open water and reed edges, while small mammals and reptiles shelter in the drier margins.

For wildlife photographers and birdwatchers, Merja Zerga delivers rewards that shift dramatically with the season. Winter and early spring bring the greatest concentrations of migratory species—vast flocks of waders probe the exposed mud, surface-feeding ducks dabble in shallows, and overhead movements of larger waterbirds create photographic spectacles at dawn and dusk. The low angle of winter light transforms the lagoons into shimmering planes of colour, ideal for long-distance observation and telephoto work. Summer presents a different appeal: breeding birds of the reed beds become more vocal and active, predatory species show heightened hunting behaviour as prey becomes concentrated in shrinking pools, and the dramatic play of heat haze over parched flats creates a rawer, more intimate sense of the reserve's ecological extremes. Access from Rabat is straightforward, and the reserve's network of observation points and hides puts photographers within range of the water's edge without disturbing sensitive feeding and breeding birds. Spring migration season—March to May—and autumn passage—August to October—are peak windows, though the reserve rewards visits year-round for those prepared for the summer's harsh Mediterranean heat.