I remember a post a long time ago, exactly the same poop as this.
Ended up being 'possum poop, I believe.
And since I now have 2 resident 'possums,
now I know what their poop looks like.
When they eat a lot of birdseed, that's what it looks like.
Mine are so tame now from being trapped in the raccoon trap,
when I release them, they waddle out of the trap like, 'Thanks, Mom!'
But they leave their poops, and that is what they look like cuz they eat from my birdfeeders a lot.