Pigs have very short necks so they find it very had to look up at the sky. Remember they also have their eyes at the side of their heads. So now, quick experiment: Scrunch you head down to your shoulders, making your neck as short as possible.
The Star-Spangled Banner's particular shade of red shows up in 14.3 percent of all national flags, making it the second most common color after white. And the dark blue of the American flag's canton is also shared by 13 other nations.