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The swallow most willing to close to the huaman, and the human the most cherish this beneficial bird.
Swallows migrate every year round trip used to build nests in the same places, select the optimal height
about 5-10 meters from the ground to nesting. But with the development of modern city,tile roofed
house or cottage originally with the eaves , has turned into the high-rise buildings without low eaves,
and most buildings surface with smooth ceramic tile, do not meet the conditions of swallows nesting.
The design provides a nesting environment for the homeless swallow.
Dalian Minzu University