We have recently had some Willoughby’s leafcutter bees in our garden. They have been removing pieces of leaf from our field maple trees. The pieces they have removed are surprisingly large and we have seen them in the act quite a lot, and after they finished cutting they flew off carrying a chunk of leaf almost the same size as the bee itself! The bees then find a tube which they line with the leaves, lay their eggs inside and then seal the entrance. When the eggs hatch, the larvae will feed on the leaves inside.
There have also been common carder bees boring wholes in the wood. Other bee species we have seen include white-tailed, red-tailed, garden and tree bumblebees.