Merdja Zerga, also known as Lagune de Moulay Bou Selham, is one of Morocco's most important wetlands and top birding destinations. This 4,500-hectare coastal lagoon is a major site on the East Atlantic Flyway and vital winter home for Palearctic birds. More than 100 bird species have been spotted at Merdja Zerga. Tens of thousands of ducks and near one hundred thousand waders overwinter in the brackish waters of this semi-enclosed marine ecosystem. Notable species include the slender-billed curlew, marbled teal, marsh owl, grey heron, white stork, glossy ibis, and greater flamingo. Unsure bird watching will incite a squeal? A boat trip in search of crabs may well appeal.