/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: RimantVarkalait https://cdn.slidesharecdn.com/profile-photo-RimantVarkalait-48x48.jpg?cb=1523235552 I always wonder why birds stay in the same place when they can fly anywhere on the erth. Then I ask myself the same question.