I live about a block from the LA River. Blue Herons are routine around here. They even come up onto the freeway off ramps by the river.
An update on that Blue Heron. It is still hanging around our lake. I watched it for awhile today hoping to see it spear a fish but all it did was sort of stand still with it’s head over the water but no spearing. That would make for some great video but perhaps I will be able to catch that in the future.