Nature’s Loyalties: Revealing 4 Intriguing Insights into Animal Relationships

Indre Jasineviciute PhD, DVM
4 min readFeb 5, 2024

In the intricate tapestry of the animal kingdom, the dynamics of relationships among species have long fascinated scientists and enthusiasts alike.

Delving into the realm of fidelity, a curious paradox emerges — less than 5 percent of mammals engage in monogamous relationships. However, a surprising revelation awaits those who gaze skyward, as over 90 percent of birds seem to uphold the virtue of monogamy. The once steadfast bonds of monogamous birds reveal a more complex truth: one or both partners may not be as faithful as their outward appearances suggest.

In this journey through the complexities of monogamy in mammals and birds, we embark on a voyage beyond the surface, guided by the lens of molecular genetics.

Photo by Stephen Noulton: https://www.pexels.com/photo/swans-on-body-of-water-15457171/

Evolutionary Significance of Monogamy

When we ask ourselves, “Why be monogamous?” we uncover a thought-provoking answer rooted in the potential costs linked with mating multiply. These costs, daunting for both males and females, include the expenditure of time and energy in seeking and engaging with multiple partners, the constant threat of predators during these endeavors, and the looming risk of contracting sexually transmitted diseases.

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