One of Britain 's most critically endangered butterflies is making a comeback . The British fritillary conservation scheme partners conservationists with private landowners . The scheme generates income and could be used to save other endangered butterflies , say Butterfly Conservation .
One of Britain 's most critically endangered butterflies is making a comeback . The heath fritillary conservation scheme partners conservationists with private landowners . The project generates cash and could be replicated to save other endangered butterflies , say Butterfly Conservation .