Flamingos at Walvis
Lesser and greater flamingos flock in large numbers to pools along the Namib Desert coast, particularly around Walvis Bay and Lüderitz. They’re excellent fliers, and have been known to migrate up to 500km overnight in search of proliferations of algae and crustaceans.
The lesser flamingo filters algae and diatoms (microscopic organisms) from the water by sucking in and vigorously expelling water from its bill. The minute particles are caught on fine hairlike protrusions, which line the inside of the mandibles. The suction is created by the thick fleshy tongue, which rests in a groove in the lower mandible and pumps back and forth like a piston. It has been estimated that a million lesser flamingos can consume over 180 tonnes of algae and diatoms daily.
While lesser flamingos obtain food by filtration, the greater flamingo supplements its algae diet with small molluscs, crustaceans and other organic particles from the mud. When feeding, it will rotate in a circle while stamping its feet in an effort to scare up a tasty potential meal.
The greater and lesser flamingos are best distinguished by their colouration. Greater flamingos are white to light pink, and their beaks are whitish with a black tip. Lesser flamingos are a deeper pink – often reddish – colour, with dark-red beaks.
Located near Walvis Bay are three diverse wetland areas:
Lagoon This shallow and sheltered 45,000-hectare lagoon, southwest of Walvis Bay and west of the Kuiseb River mouth, attracts a range of coastal water birds in addition to enormous flocks of lesser and greater flamingos. It also supports chestnut banded plovers and curlew sandpipers, as well as the rare Damara tern.
Salt Works Southwest of the lagoon is this 3500-hectare saltpan complex, which currently supplies over 90% of South Africa’s salt. As with the one in Swakopmund, these pans concentrate salt from seawater with the aid of evaporation. They also act as a rich feeding ground for prawns and larval fish.
Bird Paradise Immediately east of town along the C14 at the municipal sewage purification works is this nature sanctuary, which consists of a series of shallow artificial pools, fringed by reeds. An observation tower and a short nature walk afford excellent birdwatching.
Together they form Southern Africa’s single most important coastal wetland for migratory birds, with up to 150,000 transient avian visitors stopping by annually, including massive flocks of both lesser and greater flamingos.