Moss is green and so is croach

If you live in Oregon, particularly in the valley or forested regions, you're familiar with moss.

We've got moss on the roof, on the sidewalk, in the lawn, on the trees, on the street, in between the patio pavers. It's everywhere.

Kinda reminds me of the croach in Jim Butcher's Codex Alera series. 

But the croach is kinda creepy as you would learn if you read the series. Check it out.