While the Large Marsh Grasshopper (LMG) is the biggest and most handsome of all British grasshoppers, it's also one of the rarest. The degradation and loss of their preferred habitat, fens and peat bogs, has constricted their range considerably. As of 2018, it survived almost exclusively in the valley mires and wet heaths of the New Forest and Dorset. However, its former distribution included wetland habitats across Norfolk and the Cambridgeshire fens.

Citizen Zoo is on a mission to create a world filled with wildlife – including endangered insects. We are idealistic, but also practical, and so when we realised it was feasible to restore this magnificent grasshopper back to its former range in East Anglia, we worked to develop a project. In 2018, with consent from Natural England and the Forestry Commission, we safely collected a limited number of wild LMG at several sites in the New Forest. Half were introduced directly at a wetland site in Norfolk. We brought the rest into captivity and allowed them to breed in carefully controlled conditions. Here they laid far more eggs than they would have done in the wild. These eggs were collected for hatching and home-rearing the following summer.

We could not have achieved this objective without the support and dedication of our team of volunteers, or ‘Citizen Keepers’. For 6-8 weeks during the summer, they each collected fresh grass daily, to feed hungry and growing young grasshoppers maintained in a home vivarium. A far higher proportion of grasshoppers were reared to adulthood in this way, in captivity, than would have survived from hatching in the wild.

Our first Large Marsh Grasshopper reintroduction

It was really exciting when we released the first home-reared grasshoppers into the wild in Norfolk, in 2019! Our model of working with dedicated and passionate Citizen Keepers, combined with expert guidance and robust captive breeding for reintroduction protocol, meant that from 2019 onwards we have been able to release over 6500 adult grasshoppers across six sites in Norfolk.

Perhaps even more exciting is that our two main receptor sites are showing strong signs of self-sustaining populations, meaning they are breeding and reproducing in the wild. All this has been achieved with the help of just 46 dedicated Citizen Keepers since 2018 - a fantastic achievement. This project would not be possible without them.

In addition, hundreds of volunteers from our community network have engaged through supporting Keepers and participating in events. In July and August 2024 we released this years Large Marsh Grasshoppers, including at a new site at Wheatfen Broads! It is incredible to see the project continuing to grow and evolve.

Climate change and habitat fragmentation mean that this species will face ever-growing threats to its survival. Through the commitment, collaboration and expert advice from our partners, scientists, keepers and statutory bodies, we are confident that we can turn the tide together and give this rare species a fighting chance in years to come.

Get involved to help the Large Marsh Grasshopper

To find out more about becoming a Citizen Keeper, head to our webpage here. To support the project why not donate today to help us protect the large marsh grasshopper? Or to pledge your support long term, why not become a member?