Fly-tippers have dumped ‘1000’ tyres on a nature reserve in North Yorkshire.
The rubbish was left at the entrance of the Brockadale Nature Reserve earlier this week.
Yorkshire Wildlife Trust (YWT), which runs the park, confirmed it had reported the incident to police and they were investigating.
The wildlife reserve features woodland, grassland and a river.
YWT released a picture of the waste on Facebook, writing: “We are sad and shocked that someone has dumped around 1000 tyres at our Brockadale nature reserve this week.
“As a charity, removing them will cost us time and money we don't have, impacting our vital work for wildlife and nature.
“We know there are good people all across Yorkshire who do amazing things every day - can you help or share our story?”
YWT's regional manager Ellie Barham told the BBC rubbish had been dumped at the site before but the mess left this week was “extreme”.
She said: "This is a real sanctuary for wildlife... so [it's] upsetting when this kind of thing happens.
"We're going to have to pay for it to be removed. We're a charity. We're not quite sure how we're going to deal with that, we may have to do an appeal."
North Yorkshire council said it was YWT’s responsibility to clean up the rubbish because it was private land.
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YWT added in a statement: "We'll do all we can to help, of course, including reviewing any evidence of who did this.
"Clearing up fly-tipping costs both private landowners and councils a lot of money each year.
"It's something we're really focusing on at the moment - because we know it's something people care about in the places where they live.
“And rightly so - it's a blight on our beautiful countryside."