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Do animals have gender?

The question of whether animals have gender is an interesting one. While the concepts of “sex” and “gender” often get conflated, they refer to different things. A creature’s sex refers to their biological status as male or female, while gender refers to the social constructs and norms around masculinity and femininity. Do non-human animals have gender, or do they only have sex differences?

Sex Differences in Animals

When it comes to sex, animals definitely have clear biological distinctions between males and females. Sex differences can include:

  • Presence of testes or ovaries
  • Different external genitalia
  • Different levels of hormones
  • Differences in size, coloration, or body structures
  • Different reproductive behaviors and capabilities

These physical differences allow males and females to play distinct roles in reproduction – males produce sperm, while females produce eggs and gestate offspring. The differences start emerging early in embryonic development and affect anatomy and physiology throughout the animal’s life.

Some examples of prominent sex differences in animals include:

  • Male deer grow antlers while females do not
  • Male peacocks have colorful plumage while females are more camouflaged
  • Male seahorses get pregnant and birth offspring, not females
  • Male lions grow manes while lionesses do not
  • Male frogs and crickets make loud mating calls while females are quiet

So when it comes to biological sex, animals certainly have clear distinctions between males and females. But do they also have gender?

Evidence for Gender in Animals

Gender refers to the socially constructed roles, behaviors, expressions and identities associated with masculinity and femininity. This goes beyond just biological sex differences. Certain animals have been observed exhibiting behaviors relating to gender:

  • Social hierarchy roles – In some species, males and females take on distinct roles in the social hierarchy based on norms, not just size/strength differences. For example, female spotted hyenas are dominant over males.
  • Courtship rituals – Animals like birds perform elaborate courtship dances and displays that could be seen as “performing” gender.
  • Parenting duties – Male and female penguins have distinct parental roles like incubating eggs and hunting, not defined solely by sex differences.
  • Same-sex partnerships – Some animals like flamingos form same-sex bonds and mating pairs, suggesting social gender roles that are not dependent on reproductive functions.
  • Gender non-conformity – A few individual animals like lionesses with manes exhibit behaviors typical of the opposite sex, akin to human gender fluidity.

These types of behaviors suggest that some animals may have social constructs around gender that are more than just biological differences. However, the extent to which non-human animals truly have human-like gender identities and norms is still up for debate.

Differences from Human Gender

While animals may demonstrate some behaviors analogous to human gender, there are still many differences:

  • Animals do not seem to have complex gender identities and self-conceptions the way humans do.
  • They do not have constructed languages or societal definitions of masculinity/femininity.
  • Animal social hierarchies and roles are still largely driven by size, strength and biological functions.
  • There is no evidence animals are self-conscious about cross-gender behavior or have the human concepts of transgender identity.

Additionally, notions of gender in human societies have some distinctive characteristics:

  • Human gender norms vary enormously across different times and cultures.
  • Humans attribute gender to others based on extremely subtle social cues.
  • Humans have complex gender-based social conventions like manners of dress, speech and occupations.

No other animals come close to having such intricate and arbitrary cultural constructs around gender. So while animals may exhibit some rudimentary gender-like behavior, human notions of gender remains a uniquely human phenomenon.

Gender Displays in Different Species

While no animals have gender identities comparable to humans, some species do demonstrate more gender-related behaviors than others. Here are some examples:


  • Complex social hierarchies with “alpha” males and females.
  • Distinct gender roles in child rearing – fathers vs mothers.
  • Evidence of gender non-conformity in individuals.


  • Elaborate mating displays and rituals.
  • Females receive and judge male performances.
  • Distinct parental duties like nesting or gathering food.


  • Extreme sexual dimorphism e.g. ornamented male peacocks vs camouflaged females.
  • Males create displays while female insects assess them.
  • Distinct reproductive roles of sperm production vs egg laying.


  • Some species have harem-like groups with dominant alphas.
  • Differences in territoriality and aggression between males and females.
  • Courting behaviors to entice mates.

So while various animals demonstrate some behaviors analogous to human gender, they lack the complex and socially constructed set of identities, norms and conventions that define human gender. The degree of gender displays also varies greatly between different types of animals.


In summary, while all animal species have biological distinctions between males and females, human-like gender with intricate social constructs and identities remains a uniquely human phenomenon. Some animals, especially intelligent mammals and social birds, demonstrate rudimentary behaviors akin to gender. However, no other species approaches the complexity of gender definitions, norms and roles seen in human societies. So while related in some aspects, animal “gender” is very different from the human social experience of gender.