The Culm grassland is vital for the survival of the marsh fritillary butterfly
An area of rare habitat in north Devon is helping threatened species to flourish.
The Culm grassland - which is more endangered than the tropical rainforests - is being improved in a seven-year Working Wetlands Project.
The work is already having an impact, with rare species such as the marsh fritillary butterfly starting to thrive.
The project is led by Devon Wildlife Trust which manages the land.
The trust has uploaded a video about the work to the YouTube website to highlight the importance of the grassland and the need to safeguard its future.
"Culm grassland is special because it is really good for wildlife," project co-ordinator Mark Elliott told BBC Devon.
"It supports a whole range of different plants and insects. One of our key species here is the marsh fritillary butterfly which is declining quite rapidly nationally.
Culm grassland is more endangered than tropical rainforests
"This area is nationally important for them."
The habitat is also vital for species such as the curlew as well as rare flowers and plants.
The Culm Measures area of north Devon covers 60,000 hectares and is in three pockets.
One of the aims of the Working Wetlands Project is to link the pockets together, to help species increase their range.
"Fragmentation is a problem," said Mark Elliott, "so we are working on joining up the pockets.
"The support from landowners is incredible. They are very sensitively managing the land already."
The Culm grassland is based on heavy clay which is unusable for agriculture, so is largely untouched apart from the expert management from the Devon Wildlife Trust.
The clay has the effect of storing rainwater, reducing the impact of flooding, while during dry spells, the water is gradually drained back into the rivers and streams.
Because of this vital role of the wetland area, South West Water is playing a big role in the project, which runs until 2015.
If you want to see the grassland and some of the species, the best site to visit is the trust's national nature reserve at
Use the link near the top of this page to watch the trust's film about the project.