most probably Dogs ...
wine
OkCupid, eHarmony, and match.com are among the most popular.
Nairobi
Saturady Night Fever.
Breezers were really poupular.
because it very funny.
All the poupular games, including COD: Modern Warfare 2, and Super Smash Bros Brawl.
155 in calfornia they are really poupular in calfornia
Bison.
Pigs and Cows
I wouldn't say most 'popular' I'd say most common. If there were to be a most common animal, it would be cats.
I don't know how it would be possible to count them all -however I do think it could be the US's most common wild animal.