when was he born?
5 July 1904
Ernst Mayr
5 July 1904
define species as a group of organisms that can reproduce to produce fertile offspring UNANSWERABLE what species means? A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring,  In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. is there any famous concept followed regarding this? Yes, Most modern textbooks make use of Ernst Mayr's 1942 definition, known as the Biological Species Concept as a basis for further discussion on the definition of species. It is also called a reproductive or isolation concept. who was he? He was a renowned taxonomist, tropical explorer, ornithologist, philosopher of biology, and historian of science.
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Ernst Mayr [SEP] Introduction
Ernst Walter Mayr (; 5 July 1904 – 3 February 2005) was one of the 20th century's leading evolutionary biologists. He was also a renowned taxonomist, tropical explorer, ornithologist, philosopher of biology, and historian of science. His work contributed to the conceptual revolution that led to the modern evolutionary synthesis of Mendelian genetics, systematics, and Darwinian evolution, and to the development of the biological species concept. Although Charles Darwin and others posited that multiple species could evolve from a single common ancestor, the mechanism by which this occurred was not understood, creating the "species problem". Ernst Mayr approached the problem with a new definition for species.