Why do the Birds not like Me?

One of Eric's favorite activities is chasing birds. Like Pokey, he is pretty confident that he can catch them, but then as he gets closer to them, they of course fly away. He always looks pretty confused when this happens and looks at us like he is saying "Why won't they play with me? What did I ever do to them? "

He loved chasing all the seagulls at the beach, but still doesn't quite get it...