Black 黑

I like to paint my roving room with black as well as open roof area if open roof entrance is used, simply just because there are more advantages using black than others.

As we know roving room is the access between entrance and nesting area, if the access is painted with black will help most in reducing light getting further into nesting area as black is the highest absorption of light. The theory in simple explanation is that when black object is illuminated by white light, all wavelengths are absorbed that's why the object appears black.

In fact, sun light contains infrared, which will eventually transform into heat. Black absorbs light at the same time it will be absorbing heat from going into nesting area, which serves as heat insulation as well.

Besides darkness control and heat insulation, black wall also can be a good record board to trace growth of BH population from those bird dropping marks if you know how to make use of it.

我总是喜欢采用黑色于我的漫游室以及天井墙壁如果是天井式入口，就只是因为它有比别的颜色更多的优势。

我们知道漫游室是洞入口通往造窝区之间的路径，如果路径油上黑色，将有助于减少光线进入造窝区因为黑色是吸收光线能力最高的颜色。简单的理论解释是当黑色物体遭到白光照明，所有的波长都被吸收而出现黑色。

事实上，太阳光线中含有红外线，最终将会转化为热能。黑色吸收光线同时将吸收掉红外线而阻止热能传导至造窝区，而产生隔热作用。

除了暗度控制和隔热，如果你知道如何利用它，黑墙也可以是一个很好的记录板，从那些燕子的粪便印来观察燕子的增长。