[1] An area of reeds above the top pond, known as 'Cannop Bridge Marsh', is a nature reserve managed (under agreement since 1983) by the Gloucestershire Wildlife Trust.
[4] Facilities at the ponds include a large car park, information boards, picnic tables and a waymarked walk.
Fuller information is provided in the Gloucestershire Wildlife Trust nature reserves handbook and its main features are mixed woodland and marshland.
The marsh (grid reference SO609110) is surrounded by relics of the area's industrial heritage as it lies in the heart of the Forest of Dean coal measures.
The invertebrate fauna includes common blue and silver-washed fritillary butterflies and also the large red and blue-tailed damsel-flies.