A first for me is to find a bird nest on the ground with eggs. It was camouflaged in a patch of weeds I was dispatching. I initially thought it might have fallen out of a nearby Hydrangea, but now have learned that Song Sparrows do commonly nest on the ground if they have cover.
One lesson I learned from this is that the common practice of planting one flower at a time in it’s own isolated location won’t be a good practice for these type of song sparrow nests. They need plants close together to provide privacy and cover.
It appears that the Brown-headed cowbird has also laid eggs in this nest, although I can’t tell which is which.