SNAKING AROUND

摘要

The tall summer flowers along the towpath are buzzing with yellow and black or brown insects, but not all will sting you. Feasting on the nectar and pollen alongside the bees, and sharing their role in pollination, are many hover flies. There are about 250 species in Britain, many of which are excellent mimics of bees and wasps, allowing them to feed with impunity on bright flowers while being avoided by wary predators.