Blackcap Birds Evolution Caused By Humans!!!! (current event #2)

Evolution doesn't necessarily have to take much time before one species can split into two. Human's are known to have a significant effect on the environment, but what about creating an entirely different species of animals. The Blackcap, (Sylvia atricapilla), is a perfect example of human unknowingly causing evolution to its species. Feeding birds in the winter is an innocent human activity, however this can cause evolution. Blackcap birds are birds with the capability of flying long distances in order to migrate for the winters. They have in general a shorter and thicker beak compared to a warbler's, but is thinner than a finch's. Blackcap's furthermore often have a larger head, shorter neck, and a rather spherical body. Regardless Blackcap birds now depend on humans for their source of food, where as they should be feeding on fruits as birds that migrate southwest do. This has begun to split their species, due to Central Europeans who were feeding the Blackcap populations in the area food in the winter. It has established a migratory divide between northwest and southwest migrating Blackcap birds. The new northwest migration route is in comparison significantly shorter than the southwest, causing Blackcap birds following this route changes in their appearance. For instance these Blackcap birds now have rounder wings providing them improved maneuverability, but making them less suited for longer distance migration. In addition their bills became longer and narrower, making it less equiped for consuming larger fruits such as olives during winters. However it is immensely debated whether geographical seperation is essential for speciation to occur.
I however personally feel that this could be a perfect example to show the speed of evolution in the end. It simply shows to future generations, how an act such as this feeding birds, can unitentionally cause an entire species to evolve. Regradless I don't think that this complete population would be split into an overall different species. I think they would remain the same species and in time, if the human activity of feeding birds remains, the Blackcap birds species would eventually be subdivided into two different groups, one the northwest migrating and another being the southwest migrating. Despite the changes in their appearance and migratory route they do have the same internal body, overall diet, and necessities. I feel their migratory route shouldn't cause them to evolve so much to a point where humans must officialy establish them two different species. Nevertheless if the Blackcap birds were to split into two different species I don't see the harm in it at all, it would just be an additonal species caused by humans unitentionaly for the world today or tomorrow.

http://www.sciencedaily.com/releases/2009/12/091203132144.htm