Why are 9 spot ladybugs rare?

Nine spot ladybugs are rare because they aren't found on 5/6 of the earth. Only 5/6 of the earth is suitable for their survival. These ladybugs need a certain enviroment to hatch an egg. Actually, there are 9 species of basic ladybug and the nine-spot ladybugs have their own ladybug species! So if you could change how the ladybugs hatched, there would be a lot more around!