A red shift means that the object is moving away from you.
The evaluation of their DNA and short tandem repeats will let them know if the birds are related or not. The genetic linkage will provide information about their common ancestry as well as if they belong to the same species, or are closely related species.
One reason i could have a negative affect is that the wildlife there would have no chance to relocate. Another is that it could cause a shortage in food for the prey type animals thinning their population witch in turn would kill off predatory animals and would through the whole ecosystem off balance. Hope it helps :).
