In the 1930s the Falkland Islands were reputed to hold the largest population of Southern sea lions, with a staggering 80,000 pups estimated to be born each year. However, a census in the 1960s and again in the 1990s revealed the population had declined by more than 90%.
According to the most recent count in the Falklands, the number of Gentoo penguin breeding pairs has doubled when compared with the number counted during the last census in 2005. Rockhopper penguin numbers are reported to be stable.