There are extensive areas of saltmarsh in Cumbria and most of them are grazed by cattle and sheep. This produces a short sward which is ideal foraging habitat for natterjack toads.

Pools in the upper reaches of the saltmarsh are ideal for Natterjack breeding as they tend to be shallow and devoid of vegetation. Also they occasionally get inundated by the tide which is advantageous to natterjacks for two reasons: Firstly the seawater flushes out any predators that are in the pools, and secondly, unlike other amphibians natterjacks can breed in slightly saline water.