Birds don't need lessons in building nests. Fish don't need coaching to
learn how to swim. All animals have instincts. They're born with natural
abilities to do certain things. Wild animals also learn by copying their
parents and practicing. And pets learn through training.
But instincts and training aren't the only keys to animals' behavior.
Scientists say animals' thoughts and feelings also influence their actions.
Animals often make choices, plans, and sensible changes. They can help others
and solve problems. Some even make and use tools!
If animals could talk, what would they say about their thoughts and
feelings? A gorilla (大猩猩) born in captivity (关在笼子里) has helped answer that question. Koko, a gorilla, was taught to
use sign language. She has learned hundreds of words!
Koko once had a pet cat she named All Ball. "Koko love Ball,"
she signed. "Soft good cat." One time, she blamed the cat for biting
her by signing "You bad dirty toilet!" When her pet died, Koko cried.
"Sad for sleeping cat," she signed.
Koko calls herself "fine animal
gorilla". She uses sign language to argue, joke, and ask and answer
questions.
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