This wetland reserve is formed by three loops in the River Tees, each with its own character and special wildlife. Bowesfield is home to a growing number of birds (such as stonechat, water rail, lapwing and curlew) which roost and feed in the rich, wet grassland and lakes found on the site. The reserve also offers opportunities to spot otters and sand martins along the river. Reedbeds on the site are home to reed bunting and harvest mouse, whilst roe deer can often be seen moving through the reserve.