Our Changing World: Black-eyed gannets and H5N1 bird flu

2020 saw the start of two global pandemics. Covid-19, of course, but also H5N1 bird flu, which has since swept around the world leaving millions of dead wild birds in its wake.  It has reached everywhere – except Australia, New Zealand and the Pacific.  On Our Changing World today, Alison Ballance has been finding out why this strain of bird flu is so deadly, and why scientists are keeping an eye out for gannets with unusual black eyes.