Hey idiot... Spiece and races are two very diffrent things...Mixing races is not normal, if you don't believe it just look at nature.. Have you ever seen a robin mate with a crow? never!
Just watch the the expressions on peoples faces when they see a white with a black, you just know what they are thinking. Just like in nature, mate within your own.
blacks with blacks, carmel with carmel yellow with yellow, white with white, it has worked very well in nature for a long long time.
Black white or yellow, we are all Homosapians.
So mixing is ok, to creat genetic diversity, its more like white tigers mixing with orange tigers, same speices diffrent phenotype.
The birds are diffrent speices!