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.
Harpy Eagle Size. Harpy eagles are well known for their large size, and are the heaviest raptors in the americas. Like many birds of prey, the female harpy eagle is larger than the male. One reason for this may be so that they are not competing for the same prey.