What were important events that happened in homeless bird that can reflect on Jonas?

1) each morning , dew glistens on the grass. 2) the sun yawns , scanning the horizon for companion clouds. 3) perched high ancient oak trees, startlings and sparrows announce a new day.

What is the meaning of the word checking as it is used in this sentence from the second paragraph of the passage?

Which form does a verb take when the subject receives the action?