About ten years ago I planted a Choisya (Mexican Orange blossom) primarily for its blossom's scent. The range of insect feeders has been quite limited although a number of fly species are attracted, as well as some hoverflies and and several sawfly species plus both large and small white butterflies.
This year however the bush has become the focus of several Rose Chaffers (Cetonia aurata) which fly up from the plant, make several broad circuits and then return to rest or feed from the flowers.
CM