Damara Terns Sterna balaenarum nest at high densities on the central Namibian coast and overlap in both space and time with vacationing fishermen and quad bikers. This results in high non-hatching rates of up to 50% and reduced breeding success for the densest known colony of terns. In November 2000, information boards and a barrier preventing off-road vehicles from entering a Damara Tern breeding site near Swakopmund were erected.