breeds on the Atlantic and Pacific coasts of South America, in Argentina
(at 63 sites), Chile
(at least 10 locations), and the Falkland Islands (Malvinas)1
, with some migrating north to southern Brazil2
. A juvenile was discovered in El Salvador in 200710
. The world population is estimated at 1,300,000 pairs: 950,000 along the Argentinian coast, 100,000+ in the Falklands (Malvinas) and 200,000+ in Chile1
. Population trends differ between colonies. The two largest colonies in Argentina have both shown decreases during the last decade, but other small colonies have grown9
In Argentina, the Caleta
Valdes colony increased from two pairs in the early 1960s to 26,000 pairs in the early 1990s; the Isla Deseado colony more than doubled between 1986 and 1996; the colony at Punta Tumbo has decreased almost 30% since 1987 owing to higher juvenile and young adult mortality; and the Cabo Virgenes colony has remained stable for at least the last 10 years1
. It is reported that the Falkland Islands colonies have declined almost 50% since the 1980s, but data are insufficient to substantiate this4,7
. Overall, trends are uncertain but there are significant declines in some areas and substantial mortality owing to a variety of ongoing threats.
No one has provided updates yet.