Male mammals are not always bigger.

MAMMALS; MALES; BODY size; BLUE whale

A recent study challenges the common belief that male mammals are generally larger than females. Researchers analyzed the body mass of 429 mammal species and found that in most cases, females are the same size as or even bigger than males. While about 45% of species did have larger males, 39% showed no significant size difference, and 16% had females that outweighed males. This pattern was particularly evident in rabbits, hares, rodents, and bats. One theory suggests that larger female size may be advantageous for producing and carrying larger offspring. However, further research is needed to fully understand animal size. [Extracted from the article]

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