The first thing that strikes you about Potteric Carr is the sheer scale of the site and the work that must have gone into creating the rich wildlife habitats there, as well as the amount of work still underway to extend and enhance the site. This 250 hectare nature reserve, on the outskirts of Doncaster, is a haven for wildlife. The wetland habitats attract over 70 species of breeding birds as well as lots of other wildlife.
I met Andy Dalton, the Reserve Manager, and Nic Scothern, South Yorkshire Regional Manager, to learn more about how the reserve is managed and what Yorkshire Wildlife Trust have been doing there.
Ironically, Potteric Carr in its current form owes its existence in part to the history of industrial activity in the area. This low-lying part of the Humberhead Levels had been partially drained and was being used for farming and forestry. In the 19th century, the Great Northern Railway was laid across the site, and soon rail lines criss-crossed the site, isolating small areas of land. These could no longer be accessed for farming, and became wilder. In 1951, coal mining activity nearby caused subsidence, creating marshy areas and pools.
In 1968, Yorkshire Wildlife Trust took on 13 hectares of the site and worked with local volunteers to manage the area for nature conservation. Over time, the nature reserve has been extended and now includes a remarkable diversity of habitats including several different marshland areas.
At Huxter Well Marsh, a huge area of reed bed has been created specifically to attract bittern, which used to overwinter on the reserve but never stayed to breed. It has been a resounding success, the first breeding bitterns were seen in 2014 and two juvenile birds have been seen this year, confirming that breeding has been successful.
While we were looking out from the Piper Marsh hide, I saw a golden brown bird with chocolate coloured markings rise up just above the reeds. It was so quick that I just got a glimpse of pointed wings and a head coming to a sharp point before it dropped back down into the reedbed. Andy confirmed that it was a bittern and said it was probably a juvenile, looking for food.
The reedbeds have also attracted other wildlife; marsh harriers started to nest in 2014 too, the first marsh harriers to breed in Yorkshire for 350 years. Unfortunately Geoff and I failed to spot one of these on our way round, although we were looking out for them after Andy had spotted one flying across a field as we were chatting in the cafe.
We didn’t mind though, there was so much to see as we wandered round the site, stopping off at various hides to look across the pools and marshland. Each marsh seemed to have a different character. Huxter Well Marsh is full of noise from the raucous black-headed gulls which nest on the islands. Others are havens of tranquility, little egrets silently stalking in the shallows whilst a heron stands motionless waiting for a hapless fish to swim into its reach. On Willow Marsh, we watched the coots busying back and forth, their half grown chicks piping shrilly as the ventured away from their parent.
Wet woodland in another important habitat on this reserve (hence the name: Carr is a type of wet woodland) and Yorkshire Wildlife Trust aims to restore more of this habitat, which should be good for willow tits. The Dearne Valley is a stronghold for this rapidly declining species.
The rich variety of habitats are the product of 48 years of hard work by the Trust and its volunteers, but it doesn’t stop here. The Trust is now working on the next 60 hectares of grassland restoration, and plans are afoot for a new visitor centre. I can’t wait to come back in a few years and see how it is all getting on.
Edited 29th June to correct names. Sorry, that will teach me to write better notes next time!