http://www.hko.gov.hk/blog/b5/index.htm
台長網誌-天文台的集體回憶
天文台總部有一枝桅杆，支撐著舊日用作接收世界各地天氣數據及天氣圖的天線。該天線已被列作天文台的文物。近日有同事留意到有雀鳥在桅杆頂部雀巢旁憩息。
漁農自然護理署的同事已確認是普通的喜鵲，常見於市郊。我們在天文台所見，喜鵲有長達二十厘米的尾巴，較易辨認。在忙著築巢時，其尾巴常伸出巢外。其下有一個舊鳥巢，現為其他雀鳥所用。
喜鵲常在天文台一八八三大樓走廊上棲息，彷彿並不怕人。牠有一個有趣的特性，是唯一一種能在鏡中認出自己的非哺乳動物，即使貓狗也不能做到。
Observatory heritage
The other day a colleague spotted a bird next to the nest it built near the top of a mast. The mast supports an aerial network which the Observatory used in the old days to receive radio broadcasts of weather data and charts from elsewhere in the world. The network is a declared heritage item.
A colleague from the Agricultural and Fishery Conservation Department kindly confirms that the bird is a common magpie.
Common in suburban areas, the magpie can be identified by its long tail, some 20 centimetres on the ones we see at the Observatory. Its tail can often been seen sticking out of the nest as it busies itself with building or reinforcing the nest.
The old nest underneath is being used by some other birds.
Magpies are often seen resting on the verandah of the Observatory 1883 Building. They do not avoid people. An interesting tidbit about magpie is that it is the only non-mammal that recognizes itself in a mirror. Even your pet dog or cat cannot do that.
