What are the image meanings of seagulls in poetry?

In ancient poetry, seagulls often write about people's lives and the blind date of waterfowl, which is used to express the poet's desire to live in harmony with nature and indifferent to the quiet inner world. However, if seagulls are not close to people, it means alienating people.

Examples of ancient poetry:

Du Fu's "Welcome": "I am in the north, I am in the south, spring water is flooding, and I only see seagulls day after day."

Wang Wei's "After the rain clears, I hope to stay in Sichuan" said: "Why are you afraid of seagulls when you give up your honor to the rough people? ? "

Li Bai's Ode to the River: "Immortals need to ride the yellow crane, and sea passengers have no intention to follow Bai Ou."