That really is accurate to all animal (humans notwithstanding) populations. Personal anecdote: I live in the Great Lakes region. Every spring Fish Flys [1] w

That really is accurate to all animal (humans notwithstanding) populations. Personal anecdote: I live in the Great Lakes region. Every spring Fish Flys [1] would swarm over every exterior surface and especially congregate near light sources. Some years were worse then others, and one particularly bad year I had to take a snow-shovel to clear the gas-station I worked at because the cars (and us workers) were slipping on the carpet that their bodies made. The piled-mass of bodies was as big as a snow-bank. And other years would pass and I would hardly notice that the 'season' had come & gone. [1]https://en.wikipedia.org/wiki/Mayfly https://en.wikipedia.org/wiki/Mayfly