My cat does this as well when a bird is close by.....they think they are going native with the lingo. Unless he is taking a course on the internet while I am out, my bird is just pretending to speak beak talk. I pretend I don't notice....
the football field many acres are description below; A football field (including the two end zones) is 360 feet long and 160 feet wide for a total of 57,600 square feet. When you take away the two 30-foot-long end zones at each end, the field is 48,000 square feet, making an acre about 91% of the field.
An American football field is 109.728 meters long (120 yards) by 48.768 meters wide (53 1/3 yards). That makes the field 5,531.2151 square meters.