sixpenceee:

The following are Hummingbird hawk-moths. They beat their wings at such speed they emit an audible hum. Their name is further derived from their similar feeding patterns to hummingbirds. They’re found in Britain all summer long, especially in southern parts and in Ireland. 

Active in both sunny and overcast conditions, hummingbird hawk-moths are strongly attracted to flowers with a plentiful supply of nectar such as honeysuckle and buddleia. Studies reveal a remarkable memory, since they return to the same flowerbeds at the same time everyday. (Source)