While on a walk yesterday I noticed a thistle plant by the park sign.  My initial reaction was the park staff need to get busy and do some weeding.  Then I thought some more and recalled the many goldfinches that might appreciate this misplaced "weed".

Sure enough, it turned out there were a couple of goldfinches enjoying that very thistle plant and the many thistle seeds it produced.

So it seems, one person's weed is another bird's supper.