Workers from the Bay Beach Wildlife Sanctuary rescued the bird around 7:30 at night. On Wednesday, it was recovering at the Wildlife Sanctuary in Green Bay, but was very weak.
The bird is a healthy weight, so those caring for it think it has some kind of illness.
"At this point, until we get blood work back and can do some more observation with the bird, it's pretty hard to know what the problem is," said Mike Reed, the Director of the Wildlife Sanctuary. "So we're doing supportive care right now."
That care includes giving the eagle fluids and keeping it warm, as it is struggling to keep up its body heat.
The bird is an adult and is at least 5 years old.
At this point, they're not sure when the eagle will be fully recovered.