The animal was seen at Sankey Valley Park on Christmas Day at around 1pm.
It was in a culvert near the water, which is a ‘very common mink habitat’.
It isn’t the first time a mink has been spotted at Sankey Valley Park, with walkers coming across the animals on multiple occasions since around 2012.
Last time one was spotted in Warrington, Cheshire Wildlife Trust said that they are ‘a serious threat to much-loved water voles’.
A spokesperson told the Warrington Guardian: “American mink, as well as habitat loss and damage, are a serious threat to our much-loved water voles.
“Better known as ‘Ratty’ in the children’s classic The Wind in the Willows, water voles are a vital part of river ecosystems. Their burrowing, feeding and movements help to create conditions for other animals and plants to thrive – a bit like beavers do, but on a much smaller scale.
“Once a regular sight in ditches, streams and rivers across the UK, water voles are sadly our fastest declining mammal.
“Water voles have suffered these huge declines because of habitat loss, pollution of waterways, industrialisation of agriculture, housing development and predation by American mink.”