This vividly colourful image was taken by Lorne Peterson in the Butterfly Meadow. The Obedient Plant (Physostegia) also known as false dragonhead, is a member of the mint family, and very attractive to insects. It is not unusual to see a variety of late summer bees going in and out of the flowers. The plant is native to areas further south of Ottawa, but grows very well here and is a favourite garden plant.
If you look in the lower left corner, you will see a pennsylvania leatherwing (a soldier beetle) whose yellow and black colouration makes them a good wasp mimic. They are abundant at this time of year, particularly on goldenrods.