Related Content

More Like This

Show all results sharing these subjects:

  • Science and technology
  • Life Sciences


Show Summary Details


Allen's rule

Quick Reference

A 19th century ecogeographical rule that the warmer the climate the longer the appendages (ears, legs, wings) of warm‐blooded animals in comparison with closely related taxa from colder climes. See also Bergmann's rule, Golger's rule.

Reference entries