Beluga whales may have passed the mirror self-recognition test. A study published in PLOS One documents two belugas at a New York aquarium, Natasha and her daughter Maris, displaying the behavioral markers of MSR: neck stretching, pirouetting, nodding, and head shaking in front of a two-way mirror. This cognitive benchmark had never before been recorded in the species.
If the finding holds, belugas join a list of fewer than ten animals confirmed to recognize themselves: humans, chimps, bonobos, orangutans, possibly gorillas, Asian elephants, bottlenose dolphins, probably magpies, possibly orcas, and one fish, the cleaner wrasse. Dogs, cats, and monkeys have been tested and failed. The list is shorter than most people assume.
The article does not stop at the result. It interrogates the test itself, asking what MSR actually measures and whether passing it means what scientists have long claimed. That methodological tension is the real reason to read the full piece.
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