The British Mountaineering Council (BMC) is reminding people that climbing restrictions on Clwyd Limestone in Wales due to nesting birds are now in full force.
There are a number of important and protected species that nest on the cliffs at the Eglwyseg escarpment of the limestone, including ravens and peregrines.
This year, a raven has nested within 50 metres of the Silent Spirit route at Dinbren, and climbers are strongly requested to avoid gearing up or climbing near this route until the beginning of May.
The restrictions have been reached after years of negotiations between the BMC, local climbers, Denbighshire Countryside Services and local bird expert John Lowton Roberts.
Mr Roberts, who monitors the sites, will allow for the restriction to be lifted early as soon as the birds fledge.
The BMC said: "Climbers have a brilliant track record of agreeing and sticking to the annual (temporary) restrictions on climbing on sections of the Eglwyseg escarpment on Clwyd Limestone.
"Most climbers are well aware of the restrictions that apply and of the need to adhere to these restrictions to protect these wonderful species."
There are other restrictions that apply to the Eglwyseg Escarpment – climbers can see them here.