We have lots of Great Blue Herons here . During the spring , some preserve managers block even some trails that are not very close to rookery areas , to avoid disturbing the nesting birds . When I paddle on the river , I see lots herons hunting in the shallow marsh areas . They are easily disturbed (squawk squawk !!) by me and my kayak , even at what I consider to be a good distance .
I also often see the Blue Heron, on the shore of Lake Zurich, they are great, many thanks!