Birds are the whole world of this poem, and the speaker keeps calling them "magnetic," as if they pull on everything around them. In the opening lines something falls to the speaker's feet and into the sea, which gives a slightly dizzy, dreamlike start. After that, the birds do ordinary things: swallow seeds, sleep in grass, chew weeds. Then they become larger and stranger, stuck to the clouds, soaking up light, even "open the sun." The short, chanting lines and steady rhymes make the poem feel like a repeated charm or lullaby.
The mood is gentle and hopeful, with a little loneliness underneath. In the last stanza the speaker asks the birds to follow and guide them to "my small concrete dome." The word "small" and the hard material suggest a plain, closed-in home, and the speaker seems to want the birds' light and freedom to lead them back to it. The poem suggests a longing for something natural and bright to make an ordinary place feel safe.