Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Ernst Mayr dies, aged 100

German-born biologist formulated the modern concept of species.

One of the greats: Ernst Mayr helped to reconcile evolution and genetics. Credit: © Nature

The evolutionary biologist Ernst Mayr died on 3 February at the age of 100, after a short illness. A hugely prolific writer and researcher, he was instrumental in developing modern ideas in evolutionary theory.

As an ornithologist, Mayr classified many birds, most notably risking the hostile terrain of New Guinea to catalogue the region's birds of paradise. But he will arguably be best remembered for formulating the concept of species that students still use today.

It was Mayr who defined a species as a group of individuals that are capable of breeding with one another, but not with others outside the group. This led to the idea that new species can arise when an existing species becomes separated into two populations that gradually become too distinct to interbreed; it was an answer to a biological conundrum that had eluded Charles Darwin.

Born in Bavaria, Germany, on 5 July 1904, the young Mayr was fascinated with wildlife but, at 20, was set to enter the medical profession. When offered the chance to visit the tropics to study birds, he completed a PhD in just 16 months before taking up a position at the Berlin Museum in 1926, from which sprang his work in New Guinea.

Mayr's later career was spent in the United States, first at the American Museum of Natural History in New York and, from 1953, at Harvard University in Massachusetts. In 1961 he was appointed director of the university's Museum of Comparative Zoology.

Walter Bock, a student of Mayr's in the 1950s and now an evolutionary biologist at Columbia University in New York, places Mayr's work on a par with two other great biologists, Theodosius Dobzhansky and George Gaylord Simpson. The three were, he says, architects of the 'evolutionary synthesis', the reconciliation of evolutionary theories with the processes of genetic inheritance.

Mayr's contribution was to define the species, which he did through his 25 books, including his first, Systematics and the Origin of Species, in 1942. "His books pointed out what was going on with the whole notion of the species concept," Bock says.

We may never again see someone so influential, in this era of large research groups and even larger databases, Bock adds. "Things have changed," he says. "You can't look at single people any more."


Related links

Related links

Related links in Nature Research

Ecology and evolution stories

Related external links

Museum of Comparative Zoology

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Hopkin, M. Ernst Mayr dies, aged 100. Nature (2005).

Download citation

  • Published:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing