I do the same thing.. but on purpose. M-F is my healthy meal prep, and the weekend is when I go wild and allow myself to eat out a lot and get whatever I'd like. It's like a treat for making it through the week.
I'm thinking of cutting back on my weekend eating out tho (cost reasons), so I might need to start prepping something a little different for the weekend to keep myself in check.
Oh how cool though, I didn't realize they had anything out there that can identify birds by song like that. Is it pretty accurate?