This project investigates the nest distribution of the ruff (Calidris pugnax), an endangered shorebird. Using satellite imaging, we established a suitable breeding area and analyzed the factors influ....

A single gene in the shorebird species known as ruffs controls the levels of testosterone in males, and this in turn affects their appearance and mating strategies.

We normally associate high testosterone levels with male dominance and aggression. Among ruffs – a shore bird that breeds across Europe and Asia – some males suffer from too much of it. Together with ...

Testosterone is controlled while it circulates in the bloodstream

Androgens are pleiotropic and play pivotal roles in the formation and variation of sexual phenotypes. We show that differences in circulating androgens between the three male mating morphs in ruff san...