Carrion crows (Corvus corone corone) fail the mirror mark test yet again.

  title={Carrion crows (Corvus corone corone) fail the mirror mark test yet again.},
  author={Katharina F. Brecht and Jan M{\"u}ller and Andreas Nieder},
  journal={Journal of comparative psychology},
The mirror mark test is generally considered to be an indicator of an animal's ability to recognize itself in the mirror. For this test, an animal is confronted with a mirror and has a mark placed where it can see the mark only with the help of the mirror. When the animal extensively touches or interacts with the mark, compared with control conditions, the mirror mark test is passed. Many nonhuman animal species have been tested, but few have succeeded. After magpies and Indian house crows… 

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