Carl Bergmann

German biologist

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June 22, 2026

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Carl Bergmann was a 19th-century German biologist who proposed Bergmann's Rule. This zoological principle states that warm-blooded animals in colder climates tend to be larger than those of the same species in warmer climates. The rule suggests this is an adaptive mechanism to either conserve or radiate body heat, depending on the climate.12

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Bergmann’s Rule
The principle was proposed by Carl Bergmann, a 19th-century German biologist, to account for an adaptive mechanism to conserve or to radiate body heat, depending on climate.
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The principle was proposed by Carl Bergmann, a 19th-century German biologist, to account for an adaptive mechanism to conserve or to radiate body heat, depending on climate.
Read More