Collect four propaganda slogans about loving birds and protecting them.

1. Birds' songs are the most beautiful sounds in nature, so let this sound reverberate in our ears forever.

2. Let humans walk happily in nature and let birds soar freely in the sky.

Only birds can make the blue sky full of vitality. Don't let the sky become lonely.

Let's listen to the most beautiful melody of nature-the song of birds.

5. Love birds! Don't let the tree feel lonely.