The large tree trunk features fissured bark and belongs to an English oak tree (quercus robur). On the side of the trunk is a homemade bird box / nestbox, which has a tiny circular entrance hole, being designed for small finches such as blue tits and sparrows. When positioning any nesting box on a tree or the side of a house, it is worth carefully considering its placement, so that it is placed well away from cats and strong sunshine.