[2017·河南省普通高中高三毕业班适应性测试]

　　The United States Department of Agriculture has a program called Wildlife Services. Its job is to help protect agricultural and other resources from threats and damage by wildlife.

　　Often that means helping farmers deal with unwelcome visitors. This organization has experts from different fields and it has set up thousands of inquiry agencies all over the country where farmers can explain their difficulty and get practical help.

　　One example from Wildlife Services of its work involved a farmer in Washington State, in the Pacific Northwest. Several years ago, thousands of Canada geese landed on his fields. The geese began to eat his carrot crop. Biologists from the program suggested that the farmer use noise­making devices and other measures to scare the large birds away. These efforts apparently succeeded, which made the farmer quite happy.

　　Wildlife Services also has a livestock(牲畜) protection program.

　　The program just offers suggestions to keep those unwelcome visitors away instead of killing them. Experts suggest providing secure shelter for chickens, sheep and other animals that could be attacked. They also suggest using lights above places where animals are kept. And they advise people who see coyotes around their property to chase them away by shouting, making loud noises or throwing rocks. For home gardeners, a two­meter fence might help keep out deer. To keep out rabbits, a wire fence has to be only about a half­meter high.

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