Terry Coult recorded a Yellow-legged Clearwing Synanthedon vespiformis near the Youth Hostel at Street (opposite the 'Collard Hill Car Park'). Here is his excelent photo:

0374 Yellow-legged Clearwing

Distribution is shown below.  This species we have designated "Occasional and Local" and you can see just how scarce this is - although, like other clearwings, it may be under-recorded.

Note: if you are 'logged on' and go to the species details page you can click the dots to see where the records come from.