I have lots and lots of shrews here in my garden. As I like to mulch really heavily, they really love living here. Plus the mulch draws the earthworms and I have a heavy population of earthworms for the little shrews to eat. In spite of that they don't seems to overly damage the local earthworm population.
They really don't do any damage to anything.
Sometimes two of them will meet up and then they will fight, you can hear those high pitched trills that they make.
