Gotta Love "rodents on stilts" - LOL!
Sparrows nest on the ground...?
I'm in awe of the empty spaces in your garden. I have rotten clay, sand, former pasture, wetlands, and a bit of woods, and every single square inch is crammed with a ludicrous number of plants, most of them nonnative invaders. But the native asters and goldenrod are among the worst offenders, with their seeds going everywhere AND taking root anywhere at all.
Empty space in a yard! Oh what a concept!
Mom tells me to spread weed preventer (chemicals!) or use roundup. Nope.
Winter looks more and more welcome to me with every passing year.