By Damian Carrington

Scientists warn once-common species are disappearing faster than they can be counted as North America’s ash trees join IUCN’s list of endangered species due to threat of an invasive beetle.

Native ash trees, abundant across North America, are on the brink of extinction as an invasive beetle ravages forests, according to the new red list of threatened species from the International Union for Conservation of Nature (IUCN).

By Mark Kinver, BBC News

By Patrick Barkham

Scientists .identify first tree to show strong tolerance to the disease raising hopes of developing a resistant strain.

She has a silver-grey trunk, is 200-years-old and unusually resilient. Betty, a mature ash tree in Norfolk, is offering hope that ash dieback disease will not be as destructive as first feared after scientists identified her “strong tolerance” to the disease.