Drilling Sand Martin Holes
The Limestone that makes up the Sand martin cliffs is great for supporting the cliff face for several years but is too hard for the birds to dig nesting burrows themselves.
Using a 30 inch long petrol auger holes are drilled into the face of the cliff and a nesting chamber is excavated at the end of the burrow with a high pressure water hose. It is quite hard, slow work!
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Reserves Manager at the Kingfishers Bridge wetland creation project in Cambridgeshire.