He saw a bird fly high.

Meaning: This sentence describes a bird using its wings to move through the air at a great height.

Choice of Words: Bird refers to a feathered creature that can fly. Fly means to move in the air using wings. High describes a position that is far above the ground.

Alternative Expressions

He spotted a bird soaring upwards.

Meaning: This means the person saw a bird flying very high in the sky. It's like saying, The man saw the bird flying very high above the ground.

Choice of Words: He refers to a specific male person, spotted means he noticed something, a means one, bird refers to a feathered creature, soaring means flying high in the sky, and upwards means towards the sky. When you put them together, "He spotted a bird soaring upwards" describes an event where a male person noticed a bird flying high in the sky.

He watched the bird ascend to great heights.

Meaning: This means the person looked at a bird as it flew higher and higher into the sky. It's like saying, The man observed the bird flying upwards to a very high point in the sky.

Choice of Words: He refers to a specific male person, watched means he observed something, the means a specific one, bird refers to a feathered creature, ascend means to move upwards, and great heights means very high in the sky. When you put them together, "He watched the bird ascend to great heights" describes an event where a male person observed a bird flying very high in the sky.

Related Expressions