The RHS insect reference collection contains more than 22, 800 specimens of beetles, flies, moths, true bugs, bees, ants, and wasps and other insects. The collection has been built up over 90 years and largely consists of UK native species, including examples of some insects that are the first records for Britain.
Many of the specimens were collected at Wisley, providing a physical voucher record of the biodiversity recorded in the garden. Additions to the collection are regularly made by the RHS entomologists. A digital record of the specimens and collection data is maintained on an Excel spread sheet.
The collection was rehoused from storage boxes to museum quality glass-topped wooden drawers purchased second hand from the Natural History Museum in 2010. These drawers provide better access to the collection and improved protection against dampness and pests than store boxes.