Bergmann's rule is an ecogeographical rule that states that, within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions.

Bergmann’s Rule, in zoology, principle correlating external temperature and the ratio of body surface to weight in warm-blooded animals. Birds and mammals in cold regions have been observed to be bulkier than individuals of the same species in warm regions.

Bergmann's rule is one of the best-known generalizations in zoology. It is generally defined as a within-species tendency in homeothermic (warm-blooded) animals to have increasing body size with increasing latitude and decreasing ambient temperature.

Bergmann’s rule states that organisms at higher altitudes should be larger and thicker than those present near the equator. For eg., the population of white-tailed deer is larger in Canada than in Florida. This principle was named after a German Biologist, Karl Bergmann in …

Bergmann's rule is an ecogeographic principle. It says that, within a widely distributed group of animals, the larger ones are found in colder environments, and the smaller ones are found in warmer regions.

Bergmann’s Rule is an ecological principle that suggests that within a species, individuals living in colder climates tend to have larger body sizes compared to those in warmer climates. This rule applies to a wide range of animal species, including mammals, birds, and reptiles.

Bergmann's Rule states that organisms grow to larger sizes in cooler climates. Both rules relate to body size of organisms, which is an important factor affecting the physiology and ecology of organisms.

What is Bergmann’s rule? Bergmann’s rule is defined simply: the tendency for a positive association between the body mass of species in a monophyletic higher taxon and the latitude inhabited by those species Put a little more kindly, endothermic animals (able to maintain a metabolically favorable body temperature regardless of the ...

Bergmann's rule is the tendency for a positive association between the body mass of species in a monophyletic higher taxon and the latitude inhabited by those species. Five points do need to be addressed with regard to this definition, however.

The tendency of individuals within the geographical range of a species to be larger in body size under colder climatic conditions is known as Bergmann's rule (Bergmann 1847; Mayr 1956), and is best supported in endotherms, namely birds and mammals (Ashton 2002; Meiri and Dayan 2003; Millien et al. 2006).