The mighty midge trout fly, the imitative still water anglers ‘bread and butter’ fly, is a fish-catcher supreme, but how many river fly-fishers use this brilliant fly in its various stages especially in micro-sizes . How many occasions do we go to the river bank and see fish rising. The usual train of thought is: what are they feeding on? Olives, pale wateries, spurwings? But there is no sign of any of these species. Experience through many similar occasions has now taught us to always take a closer look, and very often the fish can be seen to be ‘midging’.The knotted midge is a tiny trout fly used in the summer months.