They nest in colonies in wetlands where vegetation provides safety for the nesting site. Nests are three feet across and built in trees. They are maintained year after year. Herons will make 30-mile round trips to feeding areas. There is a heron rookery along the bay near where I live.
Many herons roost there.
It's a pretty fantastic sight to see them. In flight, the heron is monstrous in size. I have seen many herons slowly stalking prey along the shores of the Eel River, which runs by the property I caretake. When they strike, it's fast and accurate. E-mail me and tell me about it.