It is easy to see why the wasps congregate on the aphids' mating flights, but one might wonder why a large dragonfly weighing several grams would bother to feed on tiny aphids weighing less than one thousandth of a gram. In most other seasons, dragonflies focus on larger insects (mosquitoes, moths, butterflies, flies, ants, bees, and the like), but in the fall, aphids are filled with the sugars, fats, and proteins the dragonflies use as fuel to migrate south (darners and gliders) and reproduce (meadowhawks). Since autumn aphids are both slow fliers and found in huge numbers, they are readily captured, and the dragonflies merely have to fly lazily through the swarms to capture large numbers of prey, somewhat like a human eating handfuls of sweetened sunflower kernels from a jar.