In our new series which we have named after birds there are 15 caches to be found. Pen and tweezers may be required.
These are our first attempt at hiding caches.
The series covers a walk of roughly 2.5 miles on country lanes and public footpaths, with a stretch alongside a fairly busy road.
With heart-shaped face, buff back and wings and pure white underparts, the barn owl is a distinctive and much-loved countryside bird. Widely distributed across the UK, and indeed the world, this bird has suffered declines through the 20th century and is thought to have been adversely affected by organochlorine pesticides such as DDT in the 1950s and '60s.