Science in Action returns to H5N1, the fast spreading strain of bird flu which has caused devastation in the sky, sea, and land over the last few months, with no end in sight.

Roland visits Skomer Island and the coast of Wales where sea bird colonies are threatened and hundreds of guillemots have washed ashore dead, struck down by bird flu.

We also hear of outbreaks on Finnish fur farms where controversial plans are in progress for culls of wild birds, of mysterious infections of domestic cats in Poland, and bird flu causing brain swelling in grey seals.

Plus, we get an update on efforts to vaccinate condors in California against the disease.

Photo: Dead Guillemot
Credit: BBC

Presenter: Roland Pease
Producer: Ella Hubber