In nature, there are some animals that are at the top of their classes in smartness. Here are some examples.
African gray parrots (鹦鹉) are known for talking too much. They are excellent at copying humans and can form simple sentences.
When it comes to finding nuts, gray squirrels (灰松鼠) are professional (职业的). In one study, people hid several nuts to find out how squirrels solved the problem. The squirrels were quick learners, and even changed ways to get their rewards more quickly.
Chimpanzees(黑猩猩) are more than 98 percent similar to humans. They have a type of social learning which only the smartest animals can achieve.
Let's talk about teamwork! The army ants (蚂蚁) often join together to build a living ant tower. Researchers (研究者) discovered that they made decisions as a group.
Pigs are actually considered the fifth most intelligent animal in the world. They have excellent memory. They can find their way home from huge distances away.
A. Smart little piggies
B. Union (团结) is strength
C. Experts in nut searching
D. Humans' closest relatives
E. The cleverest talking birds
