2 ms·
Not sure about crows, but there is this with songbirds: https://www.pnas.org/doi/10.1073/pnas.1207207109 https://www.pnas.org/doi/10.1073/pnas.1207207109
by cma 3y ago
Not sure about crows, but there is this with songbirds:
https://www.pnas.org/doi/10.1073/pnas.1207207109 https://www.pnas.org/doi/10.1073/pnas.1207207109