In a rare and captivating natural phenomenon, three ospreys—two females and one male—have been spotted nesting together near Peebles, in the scenic Scottish Borders. This unusual arrangement, documented by Forestry and Land Scotland, sees the trio sharing a nest that contains four eggs, highlighting a polygamous behaviour that is uncommon among these majestic birds. Experts report that the two females are even taking turns incubating the eggs, which adds a unique dynamic to their shared parenting duties.

Diane Bennett, a project co-ordinator for the Tweed Valley Osprey Project, noted that the primary source of tension within the nest seems to stem from the male’s fish deliveries. Both females compete to seize the meal when he arrives, suggesting that even in cooperation, elements of rivalry persist. The upcoming hatching of the eggs is likely to further intrigue researchers and bird watchers alike, as it could offer fresh insights into how these complex relationships unfold in the avian world.

Such polyandrous arrangements are exceptionally rare among ospreys, who typically engage in monogamous pair bonds, often mating for life. A study by the Royal Society for the Protection of Birds (RSPB) indicates that this particular case may be the first of its kind captured on film, showcasing the adaptability of osprey social structures in the face of changing circumstances. In another remarkable incident in Stirlingshire, an osprey named Drunkie caused a stir by simultaneously tending to two nests with females Katrine and Arklet, each of whom laid eggs, further complicating the male's role as both protector and provider.

However, the dynamics of osprey relationships are not always so harmonious. In a distressing occurrence in the Cairngorms National Park, a new male osprey’s aggressive takeover resulted in the destruction of eggs laid by the established female, EJ. This incident highlights the darker side of osprey territoriality and competition, leaving RSPB Scotland hopeful that EJ might pair with the new male and attempt to nest again.

The complexity of osprey relationships is underscored by cases of older birds losing mates to younger rivals, as seen with a legendary osprey known as Lady, who is thought to be one of the oldest of her kind. Faced with competition for her long-time partner, Laddie, the situation raises significant questions about survival and territorial behaviour within these magnificent birds.

As the nesting period unfolds, observers remain keenly interested in how these unique interactions will play out, not just at Glentress but throughout the Scottish landscape, where ospreys have made a remarkable recovery since their near extinction in the UK several decades ago. Their return is a testament to conservation efforts and serves as a reminder of the complex, often surprising nature of wildlife behaviour.

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Source: Noah Wire Services