Least Bitterns are known for being shy and very well-camouflaged, great at hiding in the marsh. I spotted this Bittern fly in on a recent early July morning, and assumed it would quickly scoot off into the dense foliage.
But when I hurried over to get a better look, she just stood there, posing atop the reeds. She stayed there in full view for several minutes, a rare treat. See much more on these elusive birds at eBird and at All About Birds-Least Bittern.