In the top picture you can see several geese ringed with individually engraved colourrings.
By reading those rings trhough a telescope I am collecting data about the locations where the geese feed and the survival of their goslings.
The arctic fox is killing a lot of goslings. Now average family size is 1 gosling per family, while it was 3 goslings per family a month ago.
The geese are restless and eating fast. To the left you can see them graze over the tundra in a video.
The fox must have been watching too. Suddenly the geese run towards the water and a fox sprints with double the speed from far.
Two goslings are killed and the fox starts hiding them.