Traits and Adaptations based on environment are very different from evolution/mutation. The former suggests that based upon a particular environment over a period of time one gains intelligence and abilities to better survive in that environment while still being the same core being. The latter is a theory that suggests that based upon a particular environment over a period of time one mutates (either adding or subtracting chromosomes and other atomic and sub atomic structures, although to date science has only seen mutation by the subtracting of not the adding to) to better survive in that environment not by staying the same core being but in-fact changing into another being unique unto itself.
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The title itself is contradictory to the argument... They're still birds and for that matter the same species of bird, finches..
I'm not sure what you are asking to provide for you then...? The closest thing we have is a fossil record.
An example would be whales:
[ame=http://www.youtube.com/watch?v=I2C-3PjNGok]YouTube - Whale evolution[/ame]
Evolution hasn't stopped its just stayed constant. And entirely new and dynamic species can't evolve in the time as short as Man has been on the Earth. Like i said, to see the full effects of evolution you would need to live for millions of years.