HI Vivian
The beetle is a the Rose Chafer, Cetonia aurata.
The Rose chafer can be spotted on garden flowers, as well as in grassland, woodland edges and scrub. Although considered a garden pest, it is an important recycler of nutrients, feeding on decaying matter.
Rose chafer grubs eat the roots of grass and weeds. Adult rose chafers feed primarily on flower blossoms, especially roses and peonies, causing large, irregular holes. They also damage fruits particularly grape, raspberry and strawberry.
kevin