Northwest Airlink Operator Mesaba operated these SAAB SF-340's to many small airports from their hubs before Delta cut the routes.

I was at the Zoo on a nice February day in 2008, and happened to see one flying over low, so, I took a photo of it.
I'm glad I did now that I no longer see them.

Kind of miss hearing the sound they made, I could always tell who and what it was.