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.
Here are the top 10 largest eagles in the world. Eagles are members of the bird family. Accipitridae, and belong to several genera which are not necessarily closely related to each other. Most of the more than 61 species occur in Eurasia and Africa.