Four species of butterfly have become extinct in the UK in the last 25 years. A further 19 species, including the White Admiral, are Vulnerable to extinction, according to the charity Butterfly Conservation.
The findings come in a report by the organisation, called the Red List of British Butterflies. It lists the ghostly Wood White as one of eight Endangered species.
This confirms that butterflies are not only a highly threatened group in Britain, but that they are faring worse than dragonflies, birds and plants. The Pearl-bordered Fritillary has also been classified as Endangered.
The 23 species that are considered to be regionally extinct or threatened represent 37% of Britainís native butterflies. The Grizzled Skipper is one of nine species that are rated as Vulnerable.
Conservation measures have already brought the Large Blue butterfly back from extinction, according to Richard Fox, lead author of the Red List.
But Butterfly Conservation says that far more work needs to be done if Vulnerable species such as the Brown Hairstreak are to be saved from extinction.
What are these?