Swallows Seem To Be Evolving to Avoid Cars

[pocaracas]

It's like any selective breeding that we do. You can "change" the appearance of any species quite significantly using only the existing genetics, that's not evolution I'm afraid, that's simply an example of the flexibility inbuilt in species to adapt to changes in the environment, etc.

It's like the selective breeding mankind did with wolves.... that became dogs. It took quite a while, not just 30 years.
But I'll wager that the wild animals slowly acquired some features that enabled them to be welcomed by people... and, somewhere along the line, a new species appeared...

Here's an experiment being done with foxes, in an attempt to domesticate them: http://en.wikipedia.org/wiki/Tame_Silver_Fox