This is how it goes for the piglets after the tourists return

Last year, it flew like never before around large groups of sea eagles, when tourists were not allowed to visit the island due to the pandemic.

The sight of the eagles frightened the piglets, who in a panic rushed out of the rock shelves and dragged eggs or chicks over the edge.

- At most we saw gangs of 30 young eagles, says Olof Olsson, researcher at Stockholm's Resilience Center.

He has studied the herring piglets on Stora Karlsö for many years and says that sea eagles do not start nesting until they are eight to ten years old.

- Before that, they can move around in large groups, but we do not see that at all this year, says Olof Olsson.

See how the panicked piglets throw themselves off the shelf and hear Olof talk about the "tourist effect" in the video above.