This nest appeared in a path near Mary’s Vassar Community Gardens plot:
The bird obviously took advantage of modern technology, because it’s held together with generous loops of plastic string:
We don’t know where it came from or how it got onto the path.
The Smell of Molten Projects in the Morning 
Our squirrels know how to use mineral wool, but the Eurasian pygmy owl accepts only “organic thermal insulation” i.e. chickadees’ feathers.
I always admire critters for being able to find their raw materials, then build a nest / hive / burrow from scratch: not a single retail package was involved!