In a production facility, labor and material costs are usually variable costs that increase as the volume of production increases. It takes more labor and material to produce more output, so the cost of labor and material varies in direct proportion to the volume of output.
The harpy eagle's name comes from. the harpies of Greek mythology which were ferocious winged creatures with sharp claws, a woman's face and a vulture's body. The average weight of a harpy eagle is 18.4 lbs (8.2 kg). Female harpy eagles are larger than the males. A female can weigh from 14 to 18 lbs (7-9 kg), while the males weigh 10 to 16 lbs (5-8 kg). Their body length is between 36 and 40 inches (1 meter). Their feathers are slate-black above and white to light gray underneath.
As is true with most birds of prey, the female is almost always larger than the male. A female bald eagle may stand as much as 107 centimeters (42 inches) high, with a wingspan of up to 240 centimeters (8 feet). Males stand up to 90 centimeters (35 inches) high, with wingspans of nearly 200 centimeters (6 1/2 feet). typical bald eagle nest (eyrie) will range from 1.8 to 3 meters (6-10 feet) in diameter and about 1.8 to 3 meters (6 to 10 feet) high. The nest cavity, where the eggs are laid, will be about 30 to 40 centimeters (12 to 16 inches) in diameter and about 10 centimeters (4 inches) deep.