Introduction to bird watching: The birds sometimes soar in the sky and cover the sky, and sometimes they land to rest and cover the islands and rocks. In particular, the sea ducks fall like autumn leaves clinging to the ground, and the seagulls fly up like snowflakes dancing lightly. The contrast is strong and black and white are clear. Various water birds soared and landed gracefully, singing to their heart's content, and the sounds were mixed, forming a bird symphony.