Cliff swallows construct ovenlike nests, also out of mud but with a small round entrance hole.
崖燕也以泥巴筑巢，只是筑成的巢像烤箱，只留一个小圆。
Cable entrance cover plate: interchanged and removed easily, convenient to open cable entrance hole and conducting cable.
可相互替换，移动方便，易于开孔进线和电缆导入。
Ideally, the site will be a cavity in a tree, well off the ground, with a small entrance hole facing south, and lots of room inside for brood and honey.
从理想的角度讲，新家的地点将在一棵树的内部，离地面要有一定的距离，蜂巢座北朝南，蜂巢里也要有大量可以生育并储存蜂蜜的空间。
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