An eagle is at the top of the food chain. A mountain isn't considered food. Maybe the plants it carries and algae, but the mountain itself is not a food. Mice as we should know is well know to be (depending on the food chain and how many animals you add,) is either close to the bottom or pushing just a taste towards the middle.
Mouse eats the brass and berries and things from the mountain and the eagle eats the mouse, therefor by logic the Eagle would be higher than the mountain and mouse. in this example the Eagle would be on top of this chain.
