Many non-poisonous snakes also have bright body colors like poisonous snakes. This way of adapting to the environment is called warning color. Is this sentence correct? Why?

Not very accurate, especially the first sentence. Because bright colors are not the characteristics of poisonous snakes, most poisonous snakes are grayish brown or have some black stripes, such as Agkistrodon, Agkistrodon, Cobra, rattlesnake, and snake with a head. After all, there are few snakes like gold rings. Similarly, most non-venomous snakes are grayish brown.

It should be changed to-some non-poisonous snakes are as bright as some poisonous snakes, and this way of adapting to the environment is called warning color.