In general, the most widely cited definition of what a species even is is a group who’s members can produce fertile offspring. But there are still edge cases like ring species, where population A can mate with population B, population B can mate with population C, but A and C can’t.
If you’ll permit me one of my linguistics tangents, there’s an analogous phenomenon called a dialect continuum, where dialect A is intelligible to speakers of dialect B, dialect B is intelligible to speakers of dialect C, but A and C are not mutually intelligible.
Horse (equus ferus caballus) + donkey (equus asinus) = mule
In general, the most widely cited definition of what a species even is is a group who’s members can produce fertile offspring. But there are still edge cases like ring species, where population A can mate with population B, population B can mate with population C, but A and C can’t.
If you’ll permit me one of my linguistics tangents, there’s an analogous phenomenon called a dialect continuum, where dialect A is intelligible to speakers of dialect B, dialect B is intelligible to speakers of dialect C, but A and C are not mutually intelligible.
There’s lions and tigers too. Same deal with offspring being sterile
Whose
Nah, it’s definitely ‘Horse’
And now the doctorcs office waiting room have all scooted away and are watching me out of the corner of their eyes.