Rookery near the Venice Audubon Society, Venice, FL
I don't this think this guy deliberately camouflaged himself, I suspect it just stuck to his back after he swam out from some brush near shore. However, it certainly did make him look sneaky!
Cropping, adjustments to exposure, contrast, luminance and sharpening
Canon 5D Mk. III with Canon 600mm lens and 1.4X teleconverter