I personally have this belief that for those who are big fans of Kaiba and continually return to the show, that particular scene in the first episode contains a funnel of meanings and emotions that is so delicately simple and earnest that it can become a personal symbol for everyone who watches this show.

To simplify it would be to defraud it’s impactive value, but if you haven’t seen the show, just think of it as foreshadowing for what happens later on. When you’ve finished the series, go back to the bird scene and think about what it means to you.