Birds like this HarrisHawk can fly where they want to, but have been trained to come back for food.
像这种哈里斯鹰可以飞到任何它们想去的地方，但是经过训练它们会回来觅食。
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Although no raptors are easy to breed, if from the human Angle, you are a beginner then you will find that the Harrishawk and Saker falcon are two of the easiest species to persuade to reproduce.