a.c. writes
Just wondering outloud having read a previous post on worms.
So, you have a patch of ground. It's barren, hardly a blad of grass,
nor weed in site and seemingly devoid of life, nutrition et al.
You go and start a compost heap from scraps of green kitchen waste.
Then one day you suddenly discover its teaming with red worms.
How did the find it?

There's usually the odd one or two around, and they breed very rapidly
in the right conditions.
--
Kay