Today I examined a dozen bat boxes set up along the edge of a wood,
all bar one had blue tit nests in them.Some of the nests were the full internal height of the box (some 10"or 26cm),consisting of moss and sheeps wool
the box has two enterances a slit in the front, and a slit in the baseso how on earth did the tits get in and out?one however contained a rightful occupier a
Pipistrelle.Pictures when I can remember how to upload them