A Steller's Sea Eagle. The size of this thing is amazing, they dwarfed the Bald Eagles in the pen next door.
The hit of the day, from Graham's point of view, was the penguin exhibit, which had a tunnel system underneath that allowed one to pop up in the midst of the penguins.
He also like the Rain Forest section, not so much for the birds, but for the water features. It seems 3 year old really don't appreciate the fine differences between different kinds of birds. But we did.