Blue Jays and Robins are different kinds. God made creatures so that every kind he made brings forth offspring after its kind (Gen 1:11,12,21,24,25, Gen 6:20, etc., etc.) He made Robins and he made Blue Jays as different kinds of birds, but for man there is only one kind - he didn't make "white" man and "black" man in the Garden of Eden. He made "man". He made "Adam and Eve", not "Robert and Susie, and Tyrone and Shaniqua".