OK, this is not in the Fletcher Wildlife Garden, but it is in the Arboretum not far from the garden. The cluster of wooly alder aphids (Prociphilus tessellatus) are attracting the hungry attention of the ladybeetles ... one in this photo, but there were at least three more on the branch. I've seen this same scenario repeated in many locations around Ottawa, alders + aphids + lots of asian ladybeetles.