Brilliant footage on the BBC website from the Frozen Planet documentary. It depicts Adelie penguins on Ross Island, in Antarctica.
The footage they captured shows a male penguin stealing stones from its neighbour’s nest.
The birds build their stone nests to elevate and protect their eggs from run-off when the Antarctic ice melts.
Males with the best nests are more likely to attract a mate, so, in a colony of half a million penguins, the best stones are highly prized.
Jeff Wilson, director of the shoot, explained that he and the cameraman, Mark Smith, knew that the birds occasionally stole stones from one another. But he said it was a challenge to capture the moment in the chaos of a busy penguin colony.