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高考英语阅读训练（070）
Homing pigeons are placed in a training program from about the time they are twenty-eight days of age．They are taught to enter the loft through a trap and to exercise above and around the loft and gradually they are taken away for short distance in wicker baskets and released．They are then expected to find their way home in the shortest possible time．
In their training flights or in actual races, the birds are taken to prearranged distant points and released to find their way back to their own lofts．Once the birds are liberated, their owners, who are standing by at the home lofts, anxiously watch the sky for the return of their entries．Since time is of the essence (本质) the speed with which the birds can be induced to enter the loft trap may make the difference between gaining a win or a second place．
The head of a homing pigeon is comparatively small, but its brain is one quarter larger than that of the ordinary pigeon．The homing pigeon is very intelligent and will persevere to the point of stubbornness (顽强) ；some have been known to fly a hundred miles off course to avoid a storm．
Some homing pigeon experts claim that this bird is gifted with a form of built-in radar that helps it find its own loft after hours of flight, for hidden under the headfeathers are two very sensitive ears, while the sharp prominent (突出的) eyes can see great distances in daytime．
Why do homing pigeons fly home? They are not unique in this inherent skill； it is found in most migratory birds, in bees, ants, toads and even turtles, which have been
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