Are Przewalski’s horses truly a wild species?
Are Przewalski’s Horses truly a wild species, or just an escaped ancient breed?
Here a recent research that (maybe) demonstrates the second hypothesis. Like Mouflon sheep in Mediterranean region, P Horses in Central Asia seem to descend from a domesticated stock, and there are no more truly wild horses left.
The abstract: https://www.science.org/doi/abs/10.1126/science.aao3297