Green Pug Pasiphila rectangulata
Wingspan 15-20 mm.
A fairly common but variable species in much of Britain, there are a number of very dark forms, some of which do not show any obvious green coloration.
Its preferred habitats are woodland, parks and gardens, and bushy open places, and it flies in June and July.
The caterpillars feed on the blossoms of apple (Malus) and pear (Pyrus), as well as other fruit trees.