Bright future for rare butterflies thanks to Chester Zoo

By Sue Austin | Attractions | Published:

More than 150 rare caterpillars which have hatched at Chester Zoo are now destined for release into the wild in Manchester and Cheshire, where they have been extinct for a century.

One of the Large Heath caterpillars

The Chester Zoo butterfly team is working to raise the caterpillars to help prevent their extinction, in partnership with the Lancashire Wildlife Trust.

Each member of the army of freshly hatched Large Heath caterpillars is currently only a couple of millimetres long.

Conservationists at the zoo have been using fine art paintbrushes to move the miniscule species into their specially designed habitats at the zoo.

The paintbrushes allow the zoo’s invertebrate keepers to be precise and delicate when handling the precious insects.

After plenty of eating and growth, the tiny youngsters will hibernate over the winter and pupate next year, emerging in the summer as butterflies.

They will be the first to return to areas that their species once called home – the Astley Moss of Manchester and the Risley Moss at Warrington.

Large colonies previously at home in the boggy mosses of Manchester and Liverpool have long since been lost to local extinction as the UK has built its agriculture over the last two centuries. Wet mosslands were drained and converted into farmland. As the land dried, the food plants for the butterfly were lost.

The butterfly can be identified by their orange wings, each bearing six black and white ‘eyespots’ on the underside.


Ben Baker, team manager of the Chester Zoo butterfly team, said: “Few people realise that the butterflies we might see in our gardens, forests and mosslands across the UK are heavily under threat, with many species disappearing from their last strongholds throughout England.

“The Chester Zoo butterfly team already cares for endangered and rare invertebrates from across the world, as well as these local butterflies. We are working extremely hard to stop these species from disappearing.

“It is an amazing privilege to play a part in embarking these rare caterpillars on their journey, returning the species to their historic home.

The breeding programme and reintroduction forms a key part of the Lancashire Wildlife Trust led “Manchester Mosses Species Reintroduction Project”. Funded by £265,000 from Veolia and £25,000 from the Casey Group, the work is seeing a return of many long-lost plants and insects to special areas of conservation in the Manchester, Cheshire and Lancashire region.

Sue Austin

By Sue Austin
Chief Reporter

Chief reporter of the Oswestry/Mid Wales office. Keen to hear your news.


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