Crows (Corvus corone ssp.) check contingency in a mirror yet fail the mirror-mark test.

@article{Vanhooland2019CrowsC,
  title={Crows (Corvus corone ssp.) check contingency in a mirror yet fail the mirror-mark test.},
  author={Lisa-Claire Vanhooland and Thomas Bugnyar and Jorg J. M. Massen},
  journal={Journal of comparative psychology},
  year={2019}
}
Mirror reflections can elicit various behavioral responses ranging from social behavior, which suggests that an animal treats its own reflection as a conspecific, to mirror-guided self-directed behaviors, which appears to be an indication for mirror self-recognition (MSR). MSR is scarcely spread in the animal kingdom. Until recently, only great apes, dolphins, and elephants had successfully passed this test. The range of convergence was, however, expanded by an avian species, the Eurasian… 

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