According to a different source, this is the passage that comes with this question:
The wild gander leads his flock through the cool night,
Ya-honk he says, and sounds it down to me like an invitation,
The pert may suppose it meaningless, but I listen close,
Find its purpose and place up there toward the wintry sky.
In this passage, Whitman writes about an important idea of Transcendentalism. This is the idea of nature as spiritual. He talks about the gander (an adult male goose) and how its noise sounds to Whitman as an invitation. This shows that Whitman feels a connection to the animal, and to nature as a whole. Moreover, he argues that he believes this sound has a purpose and a place in the world. This contributes to developing the idea that nature connects all things, including humanity.