On the importance of ecologically relevant protocols when studying animal cognition. The chicken passed a cleverly modified version of the mirror test for self-recognition.
📄 Hillemacher et al (2023) Roosters do not warn the bird in the mirror: The cognitive ecology of mirror self-recognition. PLoS ONE 18:e0291416 http://dx.doi.org/10.1371/journal.pone.0291416