Most weigh well over 10 pounds; that’s the weight of Raton, the small dog you might see in some of our pictures. I've heard up to 15 pounds and I think that is pretty accurate. Don’t ask me how they can sit on those thin branches, but they do. And it's not bony weight; their skeleton weights only 5-6% of their total weight. Their 7,000 feathers weigh twice that much. The juvenile brown ones look bigger than the adults. I don’t know if they really have more muscle or it’s just that their feathers are more “fluffed up”, making them look bigger. Both are relatively fast, 30 mph on a level flight. But they don't use much energy; they are experts a flying on wind currents, only occasionally batting their wings as they glide through the sky. The internet says they don't pick up animals much more than 4 pounds, but I think everyone has seen one catch a salmon that is closer to 7 pounds. With a ten pounds prize, the eagle might not be able to rise above the water and might not be able to drop the catch off from the hooks in its talons. Unfortunately, both the eagle and the fish will then meet a sad ending.