I managed to take a couple of portraits of different Great Blue Herons on our Thanksgiving, Galveston Island trip. The first is a juvenile bird, very tame and very close. This image is essentially the entire sensor, handheld, out the SUV window. I always try to remember to shut off the engine for this kind of shot, pretty sure I did that this time.
The next image is an adult bird, from Bolivar Peninsula, just by Rollover Pass. I had to hike around him to get the proper sun angle and then remove my extender to get the entire bird in the viewfinder (scary stuff, handling all that glass and my 7dii, in the sand dunes. Made me wish for a vest). This is only very slightly cropped. I think the lovely yellow flowers may be Prickly Leaf Dogweed, whatever, I think they look fine with the Great Blue Heron.