选出方框内的单词或词组填空，其中有一个单词或词组是多余的

provides  in danger    live on     perfect     change     describe

If we don't protect the birds, they will be ________
Zhalong is one of the world’s  most important wetlands because it _________ food and cover for fish and birds.
If we want to learn English better, remember “Practice makes            .
As we know, tigers          meat.
Look at some pictures of different kinds of birds carefully, then __________ them.