Young northern gannets Morus bassanus in flight near Ile des Oiseaux Bird Island in the Parc National du Delta du Saloum, Senegal, North Atlantic Ocean. Young northern gannets Morus bassanus in flight near Ile des Oiseaux Bird Island in the Parc National du Delta du Saloum, Senegal, North Atlantic Ocean MORE INFO Young northern gannets are dark brown in their first year and gradually acquire more white in subsequent seasons, finally reaching maturity after five years