The Woodland Trust have a plethora of information about the benefits of bug houses – the link is here:
https://www.woodlandtrust.org.uk/blog/2019/09/how-to-build-a-bug-hotel/
Decaying wood is really important for wildlife. To make a log pile, simply collect small logs, large sticks and pieces of rotting wood. Pile them up in a damp, shady area of your garden, then stuff some dead leaves in the nooks and crannies to make it cosy.
Good for: centipedes, woodlice and beetles who like to burrow into decaying wood. Log piles may also attract birds, frogs and hedgehogs looking for a tasty snack