Fruit Flies

Those are fruit flies.
The female fruit fly lays 100 eggs 25 times in a year.
That means there are about 1.192x10^41 fruit flies produced.
If you put all the fruit flies together in a compact ball, it would be 96,372,988 miles in diameter.
That is to say the ball would reach from earth to the Sun.
Conservation of matter helps with population control.