What is "What the Geese Know" about?

It is a new poem about watching geese cross an estuary at dawn on an October morning. On the surface it describes the flight; underneath it is about the difference between how birds handle change and how people do — they simply leave, while we argue ourselves into leaving and call the argument a decision. The poem ends by reframing the empty sky as a benediction rather than a loss.

Why are geese such a common image in poetry?

Because migration carries loss and hope in the same image, and because nobody needs it explained. The sea-birds of the Old English poem "The Seafarer" stood for exile's longing, Keats used autumn's departures to hold ripeness and ending together, and Mary Oliver's "The Wild Geese" made the flock an image of belonging to "the family of things". A poet can borrow that whole history with a single line about birds overhead.

What is an objective correlative?

A term T. S. Eliot introduced in 1919 for a set of objects, a situation or a chain of events that works as the formula for a particular emotion. Instead of naming the feeling, the poem presents the external facts that produce it in the reader. "Boxes by the door, a wall where a picture hung" gives you abandonment without the word, which is almost always stronger.

How do I start reading or writing nature poetry?

Begin with ten minutes outdoors and a notebook: record the hour, the direction of the light, one sound and one temperature, with no adjectives and no feelings. Then add a single line beginning "That, too" or "I am learning to call that", which usually becomes the poem's turn. Finally repeat your opening image at the end, emptied out. Read Mary Oliver, Keats's "To Autumn" and the Old English "The Seafarer" to see the same three moves done by masters.

Does this site publish new poems regularly?

Yes. PoetryAI publishes new lyric poems and long-form readings of them on a weekly rhythm, each with the full poem, a line-by-line analysis, an FAQ and a poet profile in the wiki. Subscribe with the RSS feed at /rss.xml and every new poem arrives in your reader as it is published.

What the Geese Know

By Ilse Marchand · October 9, 2026 · 8 min read

Every October the same lecture arrives overhead: a rope of geese crossing an estuary at six in the morning, gone by eight, leaving behind a sky that looks like a room after a guest. "What the Geese Know" is a new poem about that half hour, and about the strange envy it provokes in anyone who has ever had to decide something. The birds simply leave. We have to argue ourselves into leaving, and then call the argument a decision.

Below the poem, this post looks at why migration is one of the oldest figures in verse — from the sea-birds of Old English poetry to Mary Oliver's "The Wild Geese" — and at the craft moves that make a nature poem more than a pleasant postcard: the turn, the objective correlative, and the way a line's breath can imitate a flock. It ends with three exercises you can do this week, outdoors, in ten minutes.

Over the estuary at six, the sky practises its leaving — a grey rope pulled taut from the north, two hundred wings agreeing on one direction. I have never once seen a bird look back. They do not deliberate. They do not make a plan and call it a decision, the way we do, packing a kitchen at the end of a lease. The water knows the calendar better than I do. It has been rehearsing this for ten thousand autumns: the short light, the cold clean angle of the sun, the last apples souring under the tree. Somewhere over the Baltics one of them is tired and the whole formation leans a degree to help it. That, too, is a kind of wisdom we have forgotten: how to be carried a little on the way to safety. They will be gone by eight, and the estuary will hold the empty sky like a room after a guest. I am learning to call that a benediction, not a loss — the world moves on, and lets you watch.

Why geese have always been poems about leaving

Birds on the move are among the oldest images in the language. In the Old English poem "The Seafarer", the exile on the winter sea hears gannets, swans and curlews instead of the songs of men, and the birds become proof that longing has a sound. Six centuries later Mary Oliver wrote "The Wild Geese" — the closing poem of her 1986 collection Dream Work — and gave the same sight its most quoted modern form: the geese "call and call again", and the reader is told they are welcome in "the family of things". John Keats, needing a whole season in ten lines, put swallow-like birds and the last warm days of "To Autumn" (1819) side by side so that ripeness and departure arrive in the same stanza.

The image persists because it is free. Nobody has to explain a flock: everyone has looked up. And it carries a double message that fits grief and hope at once — the birds are leaving, which is a loss, and the birds are going somewhere warm, which is a promise. A poet who needs to write about change without preaching about it can do worse than to stand on an estuary and take notes.

The turn: how a poem learns to leave

Almost every poem worth re-reading has a hinge in it, the moment it changes its mind. Critics call it the volta, and in a sonnet it has a formal address — usually the ninth line, where a Petrarchan sonnet answers the question its first eight lines asked. In free verse the turn is looser but no less real: a stanza break, a dash, a word like "but", "yet" or, as in this poem, "That, too".

In "What the Geese Know" the turn comes at the fourteenth line. Until then the poem is watching birds and envying them; from "Somewhere over the Baltics" it stops describing and starts noticing something the birds are doing for each other. That shift is what keeps a nature poem from ending in a greeting card. The outer scene supplies the material, but the poem only becomes a poem when the speaker changes. Migration is a useful subject for this because leaving is itself a turn — the flock is the world's most visible example of a thing committing to a new direction.

The objective correlative: how to write a feeling without naming it

In 1919 T. S. Eliot proposed a name for the trick: an "objective correlative" — a set of objects, a situation, a chain of events that becomes the formula for a particular emotion, so that when the external facts are given, the emotion is immediately evoked. Eliot was complaining about Hamlet, but he was describing what almost all good lyric poetry does. You do not write "I felt abandoned"; you write a kitchen at the end of a lease, boxes by the door, a wall where a picture hung.

In this poem the correlatives are deliberately plain: a grey rope pulled taut, apples souring under a tree, an estuary holding an empty sky. None of them states the feeling. All of them are the feeling, in clothes. If you take one thing from this post, take this: find the object that already contains your emotion, and put it where the reader will trip over it. Adjectives are the most expensive words in a poem; nouns are almost always cheaper and do more work.

The sound of a flock: breath, metre and the shape of a line

A poem is half score, not half essay. Here the lines run long — mostly fourteen to sixteen syllables — because the poem is imitating the slow pull of a formation overhead rather than the quick flicker of a sparrow. Long lines ask the reader to take a fuller breath, and a fuller breath slows the inner voice down to something close to walking speed. Short lines would have made the same content feel like a scatter of birds taking off.

The poem also leans on the caesura, the pause inside a line. "Over the estuary at six, the sky practises its leaving" breaks after "six", so the ear arrives at the hour and then has to wait for the rest — a small enactment of standing still while something crosses. Notice too the near-rhymes that refuse to rhyme properly: direction/decision, autumns/angels, forgotten/safety. They let the poem hint at order without pretending the world is tidy, which is exactly the tone a poem about leaving needs.

Being carried: what the last stanza is doing

The closing four lines are the part of the poem most readers quote back, and they are built the way most good endings are built — by taking the thing that seemed to be about somebody else and making it about you. The tired bird in the middle of the flight, and the formation that leans a degree to help it, is a fact about geese. The line "how to be carried a little on the way to safety" is a confession about a person.

Then the last image reverses the opening one. The poem began with a sky full of leaving; it ends with an estuary holding an empty sky, "like a room after a guest". That simile does two jobs at once: it says the loss is real, and it says the room is not ruined. The final gesture — "the world moves on, and lets you watch" — hands the reader a posture rather than a moral. You are not told to feel better about change. You are invited to be someone who is still there in the morning, looking up.

Three exercises for writing the season

The first is the field note. Stand somewhere with a horizon for ten minutes and write down only what your senses report: the hour, the direction, the temperature on the back of your hand, one sound. No adjectives yet, no feelings. This trains the objective correlative, because you are gathering the objects that will carry the emotion later.

The second is the turn. Take your field note and add one line that begins "That, too," or "I am learning to call that". Nine times out of ten you have just written the poem's hinge — the place where the observation becomes a thought. The third is the reversal: write your opening image again at the end, but emptied. Full sky, then empty sky. Rain, then the smell after. The reader feels the passage of time in the body, not in an explanation, and that physical feeling is the whole reason a poem is worth writing instead of a paragraph.

Frequently asked questions

What is "What the Geese Know" about?: It is a new poem about watching geese cross an estuary at dawn on an October morning. On the surface it describes the flight; underneath it is about the difference between how birds handle change and how people do — they simply leave, while we argue ourselves into leaving and call the argument a decision. The poem ends by reframing the empty sky as a benediction rather than a loss.
Why are geese such a common image in poetry?: Because migration carries loss and hope in the same image, and because nobody needs it explained. The sea-birds of the Old English poem "The Seafarer" stood for exile's longing, Keats used autumn's departures to hold ripeness and ending together, and Mary Oliver's "The Wild Geese" made the flock an image of belonging to "the family of things". A poet can borrow that whole history with a single line about birds overhead.
What is an objective correlative?: A term T. S. Eliot introduced in 1919 for a set of objects, a situation or a chain of events that works as the formula for a particular emotion. Instead of naming the feeling, the poem presents the external facts that produce it in the reader. "Boxes by the door, a wall where a picture hung" gives you abandonment without the word, which is almost always stronger.
How do I start reading or writing nature poetry?: Begin with ten minutes outdoors and a notebook: record the hour, the direction of the light, one sound and one temperature, with no adjectives and no feelings. Then add a single line beginning "That, too" or "I am learning to call that", which usually becomes the poem's turn. Finally repeat your opening image at the end, emptied out. Read Mary Oliver, Keats's "To Autumn" and the Old English "The Seafarer" to see the same three moves done by masters.
Does this site publish new poems regularly?: Yes. PoetryAI publishes new lyric poems and long-form readings of them on a weekly rhythm, each with the full poem, a line-by-line analysis, an FAQ and a poet profile in the wiki. Subscribe with the RSS feed at /rss.xml and every new poem arrives in your reader as it is published.

Themes in this poem

autumn poems
poems about migration
poems about letting go
nature poetry
poetry about change
seasonal poetry
poetry for beginners