The scientists' daredevil of choice was the fox squirrel, found throughout North America.
科学家们选择的胆小鬼是狐狸松鼠,它遍布北美。
英语百科
Fox squirrel
The fox squirrel (Sciurus niger), also known as the eastern fox squirrel or Bryant's fox squirrel, is the largest species of tree squirrel native to North America. Despite the differences in size and coloration, they are sometimes mistaken for American Red Squirrels or Eastern Gray Squirrels in areas where the species co-exist.