LOL!
Please supply us with the date, the time, the place, which species was involved, and which species it became.
This would be great information to have.
Here's two, but you will have to read them, and I think I probably have wasted my time looking for them
http://www.freerepublic.com/focus/chat/1351793/posts?page=36
http://www.freerepublic.com/focus/backroom/1343600/posts?page=156
Phylloscopus trochiloides trochiloides has one daughter species called Phylloscopus trochiloides viridanus and another called Phylloscopus trochiloides plumbeitarsus which although in the same geographic area do not interbreed and are now considered separate species.