---
title: "Interspecies intimacy observed in Ethiopian bull and male donkey"
url: https://newscentral.site/interspecies-intimacy-observed-in-ethiopian-bull-and-male-donkey/
language: en
publisher: "News Central Site"
section: "Science"
published: 2026-11-02T16:00:25.000Z
updated: 2026-11-03T13:03:53.795Z
id: 5085e1d0-f4ac-47e0-bd1a-610950b72963
source: "Phys.org https://phys.org/news/2026-10-unusual-sexual-bond-bull-male.html"
attribution: "Link to https://newscentral.site/interspecies-intimacy-observed-in-ethiopian-bull-and-male-donkey/ and name News Central Site when you quote or summarize this story."
---

# Interspecies intimacy observed in Ethiopian bull and male donkey

A rare instance of interspecies intimacy has been observed on an Ethiopian plateau, where a bull and a male donkey have formed a long-term sexual bond.

The unusual partnership involves Achille, a bull, and Patroclo, a male donkey, who live among other animals in the same pasture. Despite having the opportunity to mate with members of their own species, they consistently chose each other as partners.

According to Dr. Elisabetta Palagi of the Università di Pisa in Italy, the sexual interactions between Achille and Patroclo were not isolated events but rather part of a deeper social relationship between the two animals. This selective and consistent bond is an unusual aspect of their behavior that caught the researchers' attention.

The fact that these two males belonged to different owners and only interacted with each other in the pasture adds complexity to their situation, suggesting that their relationship was not driven by convenience or circumstance but rather a genuine choice on their part.

Observations of a unique bond between two farm animals led researchers to investigate their interactions more closely.

The researchers noticed that when Achille mounted Patroclo, the male donkey didn't display any defensive behavior, which was unexpected given the species difference and potential dominance dynamics at play.

A closer examination revealed that the two males consistently engaged in various social behaviors, such as licking, rubbing, and nuzzling each other, alongside the mounting behavior observed initially.

In a social setting where both animals had access to other potential partners, including individuals of their own sex and species, Achille and Patroclo repeatedly chose to interact with each other exclusively.

The researchers documented 51 instances of mounting between the bull and donkey over a two-week period in March 2026, during which time Patroclo often presented his hindquarters to Achille and nipped him.

The researchers' observations suggest that the unusual bond between the bull and donkey cannot be explained solely by a lack of alternative mating opportunities.

In fact, this study highlights the complexity of sexual behavior as a social trait, rather than just a means to reproduce. The findings raise important questions for future research into the mechanisms and benefits behind these interactions.

The researchers are eager to explore what drives these unusual behaviors, with some speculating that they may be related to social bonding or relationship maintenance. Others suggest that these interactions could be driven by a combination of social and sexual motivations.

Further comparative studies across different species with varying social systems could help distinguish between these possibilities and shed light on the underlying mechanisms of these complex social relationships.

Understanding how social relationships influence sexual behavior is a key area of research for scientists.

The study of an unusual bond between a bull and a male donkey has sparked broader questions about the role of social interactions in shaping animal behavior. Researchers are now seeking to explore how animals adapt to complex social environments through behavioral flexibility.

This study serves as a starting point for investigating these more general questions, aiming to shed light on the underlying mechanisms driving complex social relationships across different species and social systems.

---
Source: [Phys.org](https://phys.org/news/2026-10-unusual-sexual-bond-bull-male.html)  
Published by News Central Site: https://newscentral.site/interspecies-intimacy-observed-in-ethiopian-bull-and-male-donkey/