06/06/2024

What Animals Studies are Revealing About Their Minds and Ours

Many animals are much smarter than we think

Never underestimate the mind of a crow. Members of a family of birds that includes ravens, rooks, magpies, and jays, crows have been known to bend wire into hooks to retrieve food; drop nuts in a road so passing cars will crack them open; and recognize humans who have posed a threat, harassing them on-sight even months after their first encounter. But some of the smartest crows of all may be found in the animal physiology lab at the University of Tübingen in Germany. It’s there that the birds are mastering a skill you couldn’t manage until you were up to 4 years old: counting.

In a new study published in Science, researchers trained three crows to emit one to four caws in response to seeing the numbers 1, 2, 3 or 4 projected on a screen. The birds also learned to count out the proper number of vocalizations when cued by sounds, with a guitar chord eliciting a single caw, a cash register eliciting two, a drum roll signaling three, and a frequency sweep calling for four. In doing so, the birds matched or beat the numeracy skills of human children who often don’t master rudimentary counting until kindergarten.

Says animal physiologist and study co-author Andreas Nieder: “When faced with a set of three objects and asked, ‘How many?’ toddlers recite the speech sounds ‘one, two, three’ or even ‘one, one, one.’ We show that crows have the ability to count vocally [too].”

Please select this link to read the complete article from TIME.