Rather than have multiple articles for each photograph I have grouped 4 images together. Each a different bird, but all photographed around the same marsh.
The first is a young Little Blue Heron. Not blue at all. Every time I see one a book or on-line search is needed. For me the best clue is the green legs and feet, the long head feathers helps.
If I can get a close look at the wing feathers an Anhinga is easy to ID and not be confused with a Cormorant. When drying their wings the colors are really beautiful. The face, not so much. This one above would not move from his perch, so the photo is not very good.
Nothing looks like a Great Blue Heron. Besides, they’re just so tall you can’t confuse them with another bird.
And last the White Ibis. From a distance people confuse them with a small Snowy Egret. Up close that long curved bill gives them away. Young birds are dark but again, the curved bill ID’s them. I was surprised to find this one by itself. Usually they travel in small flocks.