As Kalleh has mentioned, we in the Chicago area are living though a oce-every-17-years onslaught of the periodical cicada. (I hadn'k realized that you non-USns wouldn't know of them. This brief article will background you.)

It truly is amazing how numerous they are. That sudden, massive arrearance is their special characteristic. And (word-related) there is a word for this:

... prey must constantly avoid being eaten. To do this, prey utilize a variety of survival strategies
...
some organisms utilize a survival strategy called predator satiation. This involves ... a maximum number of offspring ... produced in a short period of time. When food is so abundant, predators are satiated and that allows a greater percentage of young to survive. Examples of organisms that use this strategy include wildebeest, caribou, many plants, and the periodical cicada. [and, I might add, the now-extinct passenger pigeon, "once so numerous that by some estimates they outnumbered all the rest of the birds in North America combined".]