A group of people who regularly or potentially interbreed in nature is referred to as a species.
The biological species idea, which is the definition of a species that is most frequently used, states that a species is a group of creatures that has the potential to interbreed with one another in order to generate live, fertile offspring.
According to this definition, it is necessary for members of the same species to be able to interbreed. They don't necessarily have to belong to the same interbreeding group in reality, though. For instance, a dog in Australia and a dog in Africa are unlikely to meet, but if they did, they might have puppies.
According to the biological species idea, a collection of organisms must interbreed successfully to generate healthy, viable offspring in order to be regarded as a single species.
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