Alexander Theodor von Middendorff was a Russian zoologist and explorer of Baltic German and Estonian extraction. He was known for his expedition in 1843–45 to the extreme north and east of Siberia, describing the effects of permafrost on the spread of animals and plants.
- Occupation
- explorer, zoologist, ornithologist, botanist
- Citizenship
- Russian Empire
- Born
- August 6, 1815
- Died
- January 16, 1894
