Mary Carolyn Davies begins with an observation so ordinary it hardly seems worth a poem: wherever she has seen a sea gull, she has also seen the sea. Only in the last three lines does that small fact turn into a real question. "How does a sea gull ever find / The sea?" By then the poem has quietly shifted from reporting to wondering, and the wondering is the point.
The poem is built in three short movements, and each one changes its mood. The first stanza is a child's-eye picture of the seaside, practical and cheerful: "A beach with sand for walking, / And water free / For us to bathe in when we choose / Or to wade in without our shoes." Notice the pronouns. The gull is there, but the stanza is mostly about "us," about what the shore offers people. The second stanza turns inland, to "miles of brown earth / Where never water shows," and the tone gets slightly more serious. These are "places to avoid," a phrase that sounds almost like a warning sign. The gull, we are told, avoids them, "as every sea gull knows." That last word plants the seed of the final stanza, because it hands the gull a kind of knowledge, and the poem then asks where that knowledge comes from.
The rhyme and rhythm do their own quiet work. The poem is written in short lines, many of them only two or three stresses long, with a loose, singsong pattern that suits its simple subject. In the first stanza, the rhymes ("sea" / "free," "choose" / "shoes") are easy and playful, and the final couplet stretches into longer lines, as if the speaker were strolling along the sand. The second stanza tightens into a more regular alternation ("shows" / "knows"). Then comes the third stanza, where the pattern is deliberately broken. "No map has he" rhymes with "sea," but the rhyme is held back until the very last word of the poem, and the last line is a single word long. After so many full lines, that abrupt "The sea?" is like a pause where the speaker simply stops to wonder. The poem ends not with an answer but with an open question mark, and the short line leaves the question hanging in the air.
The key words are plain ones, and that is part of the charm. "Simple" is perhaps the most interesting. "A sea gull is a simple soul" can be read two ways. It could mean the gull is uncomplicated, not given to deep thought. But the word "soul" lifts the bird above mere instinct and gives it a kind of dignity, so the line carries both gentle teasing and respect. The contrast with "map" matters too. Humans need maps, charts, and instructions to find their way, while the gull has none. The poem sets human equipment against something unexplained and inborn, and it never pretends to know which is wiser. "Brown earth" against the implied blue of the sea is the only colour the poem offers, and it makes the inland world look dull and waterless, a place the gull would never want to be.
What makes the poem worth reading is how much it does with so little. It does not lecture about instinct or migration. It simply notices something everyone has seen without questioning, then asks the question aloud. That is a habit of mind worth having: the willingness to be puzzled by familiar things. A child reading the poem might well say, "Yes, how does it?" and discover that nobody in the poem, including the speaker, can say.
The poem's lightness is also its strength. Its tone is friendly, almost conversational, with the speaker chatting to us about beaches and bare feet before slipping in a genuine mystery. The gull becomes a small emblem of something that knows its place in the world without being taught, a creature that never gets lost on the way home. In four short lines of wondering at the end, Davies leaves readers with the pleasant feeling that the world still holds questions simple enough for a child to ask and too deep for anyone to answer.