Late summer in the North is a slower time between the explosion of spring growth and winter preparations. Watch for pair-bonding activities such as birds chasing each other, flipping wings, using erratic “mirroring motions” or energetic aquatic dances. On gravel shores, Arctic terns hover to deposit small fish into the gaping mouths of chicks. Their immatures live on the pond bottom and on aquatic vegetation, predators even as nymphs. Delicate aquatic creatures that emerge from midsummer to late summer to breed, mayflies are the only insects capable of flight as immatures.