The RSPCA have stepped in to the row over the proposed cull of Canada geese on Windermere.
It's proposed that 200 of the birds be shot as part of the cull.
Those behind it say the birds ruin habitats and their droppings add to pollution levels in the lake.
Michael Marsh, the RSPCA's Northern Wildlife Inspector said:"It seems like the lake management committee have already made up their minds and have turned down our offer of a meeting to discuss alternatives to euthanasia. "We are not amateurs."
A Lake District National Park Authority spokesman said: "I can confirm that an approach was made to meet the Windermere Geese Management Group, but the date the RSPCA suggested was not convenient.
However the WGMG is willing to meet the RSPCA at any mutually agreed time in the future."
The RSPCA says that they will retain all rights up to and including prosecution if they witness animals being treated cruelly or suffering unecessarily.
The RSPCA have expressed anger that the Lake District National Park Authority has refused to meet them over plans to cull hundreds of Canada geese.
The park authority says that it has to cull the birds to prevent environmental damage around Windermere.
Statement from Gavin Grant, chief executive of the RSPCA, on Windermere Canada geese cull:
"We requested a meeting with the Geese Management Group to discuss our concerns and we're deeply disappointed that they have rejected our request.
"The purpose would have been to set out our scientific opinion as to why the proposed cull will be utterly ineffectual as well as immoral. Shooting birds on the nest is barbaric and has the potential to cause a great deal of suffering and it simply won’t work as other non-nesting birds will quickly move in to replace them.
"We will now be writing formally to the Lake District National Park Authority setting out this information.
"There are alternative solutions that don't involve the killing of vast numbers of birds and our specialist wildlife experts are prepared to work with them on this, but this offer has not been taken up.
"Should the cull go ahead we will take up their offer to observe it and we give due notice that should our expectations that it cannot be carried out lawfully prove to be correct we will not hesitate to move forward to prosecute those involved.
– Gavin Grant, RSPCA
"Such a cull will be a bloody stain on the beautiful waters of Lake Windermere which will take many years to wash away. We call on those who love the Lake District to join us in urging the National Park Authority to call off the cull."
The Lake District National Park Authority today confirmed that a cull of Canada Geese on the banks of Windermere will go ahead.
The Windermere Geese Management Group, which is organising the cull, said it hadn't changed its policy since last week, despite calls for more humane ways of control.
Protesters who held a demonstration against the cull are now suggesting a compromise with the LDNPA. they've agreed to fund and implement a study into non-lethal methods of population control that they argue would do the same job of controlling population without killing birds.
No-one from the LDNPA has been available for comment today
Clive Hartley is a local conservationist opposing the cull. He said:
"We have a tremendous turn out here today. The public are behind us and don't want this cull to go ahead. We are prepared to fund an independent report into the problem to find a humane, non-lethal alternative to a cull.
"The two sides are too far apart at the moment. Let's meet in the middle and find a compromise."
Around sixty protesters turned out in Bowness on Windermere today to oppose the culling of Canada Geese. Many had travelled hundreds of miles to convey their message to the Lake District National Park Authority.