"Animals are generally not allowed to cross the border." of course! We knew squirrels and no other wild animals ever cross the US-Mexico border without a passport. No duck, goose, or any other migratory bird has ever crossed the border. Other countries, yeah! The USA? Never! https://apnews.com/article/immigration-border-squirrel-texas-6a1dbf8244837c87f41224e09a9dd613