Homing pigeon, 信鴿

Credit: The European Geosciences Union
How Pigeons May Smell Their Way Home ~ Ideas, Inventions And Innovations
http://www.ineffableisland.com/2013/11/how-pigeons-may-smell-their-way-home_5.html

Homing pigeon (Credit: Five Furlongs)
EGU - News & Press - How pigeons may smell their way home
http://www.egu.eu/news/81/how-pigeons-may-smell-their-way-home/

Homing pigeon - Wikipedia, the free encyclopedia

信鴿