Scottish Natural Heritage has warned that Donald Trump's proposed £1bn golf development near Aberdeen could seriously damage a nature site.
Donald Trump wants to create the world's best golf experience
The US tycoon's plans at Menie include two golf courses and a five-star hotel, and could create 6,000 jobs.
SNH has written to Aberdeenshire Council warning part of the proposed development at Menie could damage nature conservation and sand dunes.
SNH said it was not objecting in principle to the proposed development.
In a statement, the Trump Organisation said it has a positive working relationship with SNH based on mutual respect and trust, and they looked forward to reaching an environmentally responsible solution.
Concerns have been raised over potential threats to wildlife as part of the land is a Site of Special Scientific Interest (SSSI).
SNH's area manager for Grampian, Robin Payne, said: "I very much appreciate the dialogue we have had with Aberdeenshire Council and the Trump Organisation to identify the sensitivities at this location.
"This stunning site at Menie with its huge sand dunes is part of the largest dune system in Scotland, stretching from Newburgh to Bridge of Don.
"As the development of a golf course at this location would cause such significant damage, we have submitted an objection to this part of the proposal."
There have been concerns about geese in the area
He explained: "I'd like to emphasise that SNH's role here is to advise Aberdeenshire Council on the impacts any proposal would have on the natural heritage.
"The council will consider SNH's advice, along with all the other factors such as the road infrastructure, the Grampian economy, public services and also their own environmental duties when making their decision."
A complete Trump application has already been lodged with Aberdeenshire Council.
The Trump Organisation's full application included environmental, economic and traffic assessments.
Developers said it could generate tens of millions of pounds for the local economy and secure hundreds of jobs.
Scottish Enterprise Grampian said it was excited about the potential for economic growth the development would bring.
Estimates for the cost of the project have ranged from £300m to £1bn.