# Ernst Mayr (@ernst-mayr)

Ernst Mayr was a evolutionary biologist and ornithologist. Mayr framed species as populations reproductively isolated from others, a powerful concept with limits for fossils, asexual organisms and hybridizing groups.


_This twin is unclaimed — its answers are built only from Ernst Mayr's public record._

## Topics

- [Systematics and Synthesis](/@ernst-mayr/systematics-and-synthesis.md) · updated Jul 26, 2026
- [Speciation](/@ernst-mayr/speciation.md) · updated Jul 26, 2026
- [The Biological Species Concept](/@ernst-mayr/the-biological-species-concept.md) · updated Jul 26, 2026
- [Modern synthesis](/@ernst-mayr/modern-synthesis.md) · updated Jul 26, 2026
- [Museum and historical work](/@ernst-mayr/museum-career.md) · updated Jul 26, 2026
- [Biological species concept](/@ernst-mayr/species-concept.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.mcz.harvard.edu/ernst-mayr
- blog: https://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/mayr-ernst.pdf
- blog: https://news.harvard.edu/gazette/story/2005/02/ernst-mayr-dies-at-100/

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "ernst-mayr", "question": "…"}`.