What is a bald eagle’s size? A bald eagle’s size varies with latitude and sex. To better understand the size of the bald eagle, I use weight (mass) and other less variable linear measures such as an eagle’s length and wingspan. An eagle’s weight can be influenced by the time of the year, the temporary availability of food, and whether a bird had a large meal or not before being weighed. While this is generally true, weight as the only measure of size can be unreliable. Naturally, we tend to assume that larger eagles are proportionally heavier than smaller ones. When it comes to assessing a bald eagle’s size, perception plays an important role.
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