| 摘要 |
A birdhouse where breeding pairs of birds build a nest, lay eggs and brood young birds with a fledging board or platform which is deployed just below the entrance hole in order to provide an exercise area for the young birds so that they may test their legs and wings just prior to taking their first flight. During the incubation period and when the young birds are growing up the fledge board is concealed in such a manor that no accouterments are present that would offer a footing to a predator who might otherwise use the board as a staging area to reach inside and raid the nest. The fledge board is deployed only when the young birds emerge from the cramped interior of the nest for the first time allowing them the opportunity to flex their legs and wings before taking their first flight into the world thereby reducing the likelihood of injury or death.
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