The lake olives are very closely related to the river olives.  Like the river olive spinners, the lake species also has very bright colours.  Fishing Lake Olive Spinners is not easy.  Spinner activity is at its height in calm, still conditions.  This makes a delicate cast absolutely essential as anything else will startle the feeding trout.

 

A Lake Olive Spinner pattern is one of the few dry flies that can be succesful at first light.  Trout will often feed on spinners left over from the previous night's egg laying activities.