(Photo: Chris Pearson)
Wrong the brown skua and shall he not revenge?
Researchers from South Korea have discovered a remarkable ability among the brown skuas (Catharacta antarctica) of Antarctica: they can tell humans apart from each other. After just 3-4 visits to their nests, the skuas can distinguish hostile humans from non-hostile humans. Popular Science reports:
In order to test this, the researchers walked in pairs (one was a nest intruder and the other was a neutral person who hadn't checked on the nests before). The two people then walked in opposite directions, and all seven of the pairs of skua parents focused on the intruder, trying to attack it, while leaving the unknown researcher alone.
-via Glenn Reynolds