The biological concept of species was established by Ernst Mayr. Mayr was a renowned evolutionary biologist and ornithologist whose work was influential in the field of evolutionary biology. He proposed the Biological Species Concept, which defines a species as a group of interbreeding populations that are reproductively isolated from other groups.
By focusing on reproductive isolation, Mayr's concept helped clarify the definition of a species and how they evolve separately from one another. This concept has been widely accepted and is still used by biologists today to define and classify different species based on their reproductive compatibility.
