I love the wall of birds, too...it is SO COOL! I put the Merlin app on my phone, but I didn't have enough space to accommodate the package that has the birds to help you ID them. I need a new phone or to take off some apps, I guess...
I see Great Blue Herons wading in a creek behind my house sometimes...They are SO focused when they're hunting. I've also seen them roosting in the pine trees, which always surprises me. To see those long-legged water birds perching in trees is very cool to see!