The age at first breeding was three years (probability of 0.27), and all terns were breeding at four years. This is comparable to other plunge-diving migratory terns which have extended periods of post-fledging dependence. In the light of this we suggest that consideration be given regarding the protection of the species in its non-breeding countries in addition to the protection of current breeding sites. Key words: immature survival, age at first breeding, seabirds, Damara Tern, post-fledging dependence.