During what was assumed to be the chicks fourth week, dark flight feathers start to be seen. The chicks were more mobile, moving around the nest, and much more aware of things outside the nest.
Bald Eagle Nest – Week Four
"What a thousand acres of Silphiums looked like when they tickled the bellies of the buffalo is a question never again to be answered, and perhaps not even asked." -Aldo Leopold
A Thousand Acres of Silphiums 
They are getting big and there looks are changing a lot every week. I bet they eat a lot.