FIRST DOWN. All progress in a football game is measured in yards. The offensive team tries to get as much yardage as it can to try and move closer to the opponent's end zone. Each time the offense gets the ball, it has four downs, or chances, in which to gain 10 yards.
The largest eagle species in the world is the Pithecophaga jefferyi or Philippine eagle. This species of eagle is on the critically endangered list due to the rapid decline in habitat, which is the tropical rainforest. Keep Learning.
The biggest Philippine bird is the  Sharpe's Crane (Crus antigone sharpei), known as tipol in Luzon and labong in the Visayas. It is a wading bird, with very long legs and neck, and is almost as tall as a man. Its color is pearl gray, with bright scarlet plumage on its upper neck. The largest eagle in the world, called the monkey-eating eagle (Pithecopaga jefferyi), is found in the jungles of Luzon and Mindanao. It is the King of Philippine Birds. When full grown, it measures five and a half feet in height with a wing span of seven feet. As one of the endangered species of animals in the world, it has attracted the attention of conservationists, notably Dioscoro Rabor of the Philippines and Charles Lindberg of the United States.