@sundogplanets Louisiana here, slough is very common in these parts as well
I'm a brisk walk from the Columbia Slough in North Portland, which includes nice things like a wetlands reserve, but a lot of the surrounding area was drained long ago for transshipment centers and other sorts of things that you see on the map. Not to mention an International Airport. But you see lots of leggy Blue Herons walking around even so.
https://www.google.com/maps/place/Columbia+Slough/@45.6136687,-122.7075925,13z/
@pieist @sundogplanets herons are the best!