If your crossword clue says 'common marine bird' and you have 4 letters, the answer is almost certainly TERN or GULL. With 3 letters, go for ERN (also spelled ERNE) or AUK. A common small brown bird crossword clue often points to a compact passerine whose name fits the given letter count 3 letters. At 6 letters, GANNET, PUFFIN, or PETREL are your top picks. At 9 letters, CORMORANT or ALBATROSS. Those eight words cover the overwhelming majority of 'marine bird,' 'sea bird,' and 'coastal bird' crossword answers across American and British puzzles.
Common Marine Bird Crossword Answers by Clue Pattern
What 'common marine bird' actually signals in a crossword clue

Crossword setters use 'marine bird,' 'sea bird,' 'coastal bird,' 'shore bird,' and occasionally 'seabird' almost interchangeably. Each phrasing points to a tight cluster of well-known bird names that appear repeatedly in grids because their letter counts and vowel patterns fit cleanly into standard grid sizes. The word 'marine' specifically leans toward open-water or cliff-nesting seabirds rather than freshwater or wading birds, so if your clue says 'marine' rather than 'aquatic' or 'shore,' you can confidently rule out SWAN, LOON, HERON, and WADER-type answers. Think salt water, cliffs, and open ocean: that's the setter's mental picture when writing a 'marine bird' clue.
One nuance worth knowing: 'shorebird' or 'shore bird' clues sometimes resolve to the category word WADER (5 letters) rather than a specific bird name, because 'shorebird' in British birding usage is closely tied to wading birds. If your clue uses 'marine' or 'sea bird,' that convention doesn't apply, and you're looking for a specific bird name. If you are also wondering about cloaca meaning bird, that word comes up in a different context and is best understood from its separate definition. A similar distinction comes up with 'aquatic bird' clues, which can pull in SWAN or LOON alongside the typical seabird names. 'Marine bird' is the most seabird-specific phrasing a setter can use.
Most likely answers by letter count (3 to 12 letters)
Here's a practical reference table covering the main 'marine bird' and 'sea bird' answers organized by length. These are the spellings accepted in mainstream crossword dictionaries and standard English references.
| Letters | Answer | Notes |
|---|---|---|
| 3 | ERN | Also accepted as ERNE (4); the shorter form appears in older British-style puzzles |
| 3 | AUK | Cliff-nesting seabird; very common in cryptic and quick crosswords |
| 4 | TERN | One of the two most frequent 4-letter answers for any sea/marine bird clue |
| 4 | GULL | The other top 4-letter answer; stable spelling across US and UK puzzles |
| 4 | ERNE | The longer spelling of ERN; accepted alongside TERN/GULL at 4 letters |
| 4 | SKUA | Aggressive seabird; reliable 4-letter answer when GULL and TERN don't fit cross letters |
| 6 | GANNET | Consistent spelling, derived from Old English ganot; very common at 6 letters |
| 6 | PUFFIN | Colorful cliff-nester; a setter favorite at 6 letters |
| 6 | PETREL | Includes storm petrel variants; common in UK-style puzzles |
| 9 | CORMORANT | Standard 9-letter answer for any 'sea bird,' 'marine bird,' or 'aquatic bird' clue |
| 9 | ALBATROSS | The other key 9-letter answer; large oceanic bird |
| 12 | STORMYPETREL | Rare but documented; appears when grids demand a longer seabird phrase |
The 4-letter slot is where most solvers get stuck because TERN, GULL, ERNE, and SKUA all compete. Your cross letters are the deciding factor there, which the final section of this guide covers in detail.
The correct crossword spellings for common marine bird names

Crosswords use standard dictionary spellings, and for seabirds those spellings are remarkably stable across American and British English. Here's what you need to know about each major candidate:
- GULL: Always four letters, always this spelling. No double-L variant, no alternate forms accepted in standard puzzles. Singular is the norm for crossword answers.
- TERN: Four letters, no variants. Puzzles never use the plural TERNS for a simple 'marine bird' clue unless the clue specifically signals a plural.
- ERN / ERNE: ERN (3) and ERNE (4) are both accepted and both mean the same bird (a type of eagle, often called the white-tailed eagle or sea eagle). The clue wording and your letter count tell you which spelling to use.
- AUK: Three letters, clean spelling, no confusion. Refers to a family of cliff-nesting seabirds including razorbills and murres.
- SKUA: Four letters. No common variant spelling in English crosswords.
- GANNET: Six letters, G-A-N-N-E-T. The double-N in the middle is fixed. Don't drop a letter to make GANET, which isn't a crossword-accepted form.
- PUFFIN: Six letters, P-U-F-F-I-N. The double-F is always there.
- PETREL: Six letters. Sometimes seen in compound form STORMY PETREL but as a standalone the six-letter PETREL is standard.
- CORMORANT: Nine letters, C-O-R-M-O-R-A-N-T. A historical variant 'corvorant' existed in the early 19th century but has no place in modern crosswords. Stick with CORMORANT.
- ALBATROSS: Nine letters, A-L-B-A-T-R-O-S-S. Double-S at the end. No alternate spellings in English.
Pronunciation, etymology, and why spelling stays fixed
Understanding where these names come from explains why their spellings don't drift. GULL traces back to late Middle English from Celtic roots, related to Welsh 'gwylan' and Breton 'gwelan.' That Celtic origin locked the spelling into the G-U-L-L form early, and it hasn't budged since. Pronunciation is straightforward: 'gul' (rhymes with 'hull').
GANNET comes from Old English 'ganot,' meaning a strong or masculine bird. The double-N in the middle reflects the Old English root, and the pronunciation 'GAN-it' (IPA: /ˈɡæn.ɪt/) puts stress on the first syllable. Learners sometimes mishear it as 'GANNIT' or try to write 'GANET,' but the double-N is always correct.
CORMORANT has a particularly interesting etymology that runs through Middle French and Old French into Latin 'marīnus,' meaning 'of the sea.' The bird's name literally carries the idea of a sea-creature inside it, which is why 'cormorant' fits a 'marine bird' clue so perfectly from a word-history standpoint. Pronunciation: 'KOR-muh-runt' (IPA: /ˈkɔːr.mər.ənt/). Despite a historical variant 'corvorant' that occasionally appeared in 19th-century texts, the modern form CORMORANT is consistent across American and British English, which is exactly why crossword dictionaries accept only that spelling.
TERN connects to Old English 'stearn' and Latin 'Sterna' (the scientific genus name), making its four-letter English form one of the tidiest bird-name shortenings in the language. It's pronounced exactly as written: 'turn' (IPA: /tɜːrn/). ALBATROSS carries Portuguese and Spanish roots, arriving in English via 'alcatraz' (which also gave its name to the famous island). The double-S ending in English is non-negotiable.
Synonyms and near-matches: when gull, tern, auk, and cormorant compete

The trickiest part of marine bird crossword clues is that several answers sit in the same letter-count brackets and share similar vowel patterns. Here's how to think about each competing group:
The 4-letter cluster: GULL, TERN, ERNE, SKUA
These four words fight for the same squares more often than any other group in seabird crosswords. GULL and TERN are by far the most common answers in crossword databases for both 'sea bird' and 'marine bird' clues. ERNE appears when the clue has a slight raptor angle (sea eagle, white-tailed eagle) or when the setter favors older vocabulary. SKUA fits when cross letters rule out the other three, and it's a legitimate open-ocean predatory seabird, so it's always fair game for a 'marine bird' clue.
The 3-letter pair: ERN and AUK
At 3 letters, you're almost always looking at ERN or AUK. ERN (the sea eagle) is slightly more common in older British crosswords. AUK (the cliff-nesting seabird family) is more specifically marine, so it tends to appear when the clue wording emphasizes ocean or coastal habitat. If your cross letters give you a vowel in the middle position, ERN is likely (E-R-N). If you have a U in the middle, that's AUK.
The 6-letter trio: GANNET, PUFFIN, PETREL
All three are genuine, well-known seabirds and all appear regularly in mainstream crosswords. GANNET and PUFFIN both have distinctive double-consonant patterns (double-N and double-F respectively) that become helpful confirmation once you have one of those letters from a cross word. PETREL is slightly less common as a standalone clue answer but increases in frequency with cryptic clues that play on the word's structure.
The 9-letter pair: CORMORANT and ALBATROSS
At 9 letters, CORMORANT and ALBATROSS are effectively the only standard marine-bird answers you'll encounter. They share nothing in their letter patterns, so a single cross letter at almost any position will tell you which one the setter intended. CORMORANT starts C-O-R; ALBATROSS starts A-L-B. If your first letter is confirmed, you're done.
It's worth noting that terns are biologically close relatives of gulls, and skuas are close relatives of both, which is why setters can use clues like 'gull relative' to target TERN or SKUA. If your clue adds a relational hint like that, use the family connection as an extra filter alongside letter count.
Using letter counts, vowels, and cross letters to nail the answer

Here's the practical workflow I'd recommend for any 'marine bird' clue you're currently stuck on:
- Count your squares first. This single step eliminates most of the field immediately. 3 squares: ERN or AUK. 4 squares: TERN, GULL, ERNE, or SKUA. 6 squares: GANNET, PUFFIN, or PETREL. 9 squares: CORMORANT or ALBATROSS.
- Check your confirmed cross letters. Write them into the grid mentally and see which candidates survive. A confirmed G in position 1 at 4 letters points to GULL. A confirmed T in position 1 points to TERN. A confirmed S in position 1 at 4 letters points to SKUA.
- Look at vowel positions. TERN has one vowel (E) in position 2. GULL has one vowel (U) in position 2. ERNE has two vowels (E and E) at positions 1 and 3. SKUA has two vowels (U and A) at positions 2 and 4. If you know a vowel position from a crossing answer, that narrows things fast.
- Check the clue for nuance words. 'Large marine bird' or 'ocean-going marine bird' biases toward GANNET, ALBATROSS, or CORMORANT. 'Small marine bird' or 'darting marine bird' points to TERN or AUK. 'Aggressive marine bird' or 'predatory' points to SKUA. 'Comical-looking marine bird' or 'colorful beak' is almost always PUFFIN.
- If the clue says 'shore bird' rather than 'marine bird,' consider WADER (5 letters) as a possibility before defaulting to TERN or GULL. That distinction matters because setters do sometimes use shorebird/shore bird clues to target the category word rather than a specific species name.
- Confirm the spelling before writing it in. For double-consonant words especially (GANNET, PUFFIN, CORMORANT), make sure your cross letters are consistent with the accepted spelling, not a plausible-sounding misspelling.
If you're completely stuck with no cross letters at all, TERN is statistically the single most common answer for a 4-letter 'sea bird' or 'marine bird' clue across major crossword databases, followed closely by GULL. At 6 letters, GANNET edges out PUFFIN slightly in frequency. At 9 letters, CORMORANT is more common than ALBATROSS in standard quick crosswords. Those frequency rankings won't always be right, but as blind guesses they're your best starting point.
One last thing: if you're dealing with a clue that could equally point to a marine bird or a freshwater/aquatic bird (for instance, 'water bird' or 'aquatic bird' rather than 'marine bird'), the answer pool expands to include SWAN, LOON, and PELICAN. 'Marine bird' keeps you firmly in the saltwater seabird column, so trust the wording and work through the letter-count shortlist above before second-guessing yourself. If you specifically see a common farmyard bird crossword clue, the answer is in a different category than the marine seabirds discussed here marine bird.
FAQ
If the clue is “common marine bird,” could the answer be something besides TERN or GULL?
Not always. In many American and British crosswords, “marine bird” most often means seabirds like TERN or GULL, but a few setters may extend it to large ocean birds such as ALBATROSS or CORMORANT even when the clue does not use “sea” or “salt.” Always prioritize the letter count and then check whether your cross letters match the shortlist for that length.
How do I narrow a 4-letter “marine bird” crossword answer if I have only one or two cross letters?
For a 4-letter slot, start by using the middle letter from your cross words, because the article’s main contenders separate cleanly that way: ERNE and ERN both imply an E in the middle (E-R-N pattern), AUK implies U in the middle (A-U-K), and TERN implies E in the middle (T-E-R-N). Then use the ending letter, TERN ends with N, GULL ends with L, SKUA ends with A.
Does the word “common” in “common marine bird” always mean the most frequent answer like TERN or GULL?
Yes, but it depends on what the clue is doing. “Common” can indicate an everyday bird species (often GULL or TERN) rather than the literal definition “common bird.” If your crosses force a less common species like PETREL or GANNET, it is still fair game, because many grids use “common” as a style hint rather than a frequency guarantee.
What’s the biggest mistake people make with “marine bird” vs “shore bird” clues?
Watch for punctuation and compound-word variants. “Shore bird” and “shorebird” are the ones most likely to drift toward WADER category answers, while “marine bird” and “sea bird” usually stay in the seabird-name pool. If your clue is “shore bird” and you see 5 letters, WADER is a common category resolution.
If the clue uses a relationship hint like “gull relative,” how should I use it to choose between TERN, GULL, and SKUA?
Some clues play with related terms, for example “gull relative” or “skua relative.” In that case, treat it like a filter on family relationships first, then confirm with letter count. “Gull relative” most often pushes toward TERN (a related group in crossword logic) or SKUA if the crosses fit, but GULL itself is still possible if the letters match.
Are there common misspellings that cause solvers to lose time on marine bird answers?
Spelling matters, especially for the double letters. GANNET must have two Ns, and PUFFIN must have two Fs. If you accidentally write Gannet as GANET or Puffin as PUFN, you will break compatibility with many cross patterns, so check the doubles as soon as you lock any confirming letter.
Can I rely on pronunciation when I’m stuck on a marine bird crossword clue?
Pronunciation-based guessing is risky in crosswords, even though TERN is pronounced like “turn.” The safest approach is visual letter pattern confirmation, especially with words like GANNET (easy to mishear as GANET) and CORMORANT (where solvers may simplify the internal vowels). Use cross letters to confirm exact spelling before committing.
What should I do if the clue says “aquatic bird” or “water bird” instead of “marine bird”?
Yes. If the clue is broad or uses “water bird” or “aquatic bird” instead of “marine bird,” the answer pool expands to freshwater and wading species like SWAN, LOON, and related categories. When you see “aquatic” rather than “marine,” re-run the shortlist based on the new category, because TERN or GULL may become less likely.
For a 3-letter “marine bird” clue, how can I choose correctly between ERN and AUK?
At 3 letters, use the middle-letter logic: ERN is typically E-R-N, and AUK is A-U-K. Cross letters will almost always decide quickly because only one of those patterns will fit your grid constraints. If you get an A as the middle letter, strongly favor AUK over ERN/ERNE.
What’s the fastest method to solve a 9-letter “marine bird” clue like CORMORANT vs ALBATROSS?
At 9 letters, there are usually only two standard fits in mainstream crosswords: CORMORANT and ALBATROSS. If your first letter matches C, the answer is CORMORANT, if it matches A, the answer is ALBATROSS. If your first letter is unclear, try the second or third letter next, because the internal letter patterns are very different.
Citations
For the clue wording “MARINE BIRD,” Crossword-Dictionary lists multiple accepted short answers (3–7 letters), indicating that setters/dictionaries often map “marine bird” to common specific seabird names rather than to a generic category term.
MARINE BIRD Crossword Clue - 3-7 letters - https://crossword-dictionary.com/clue/marine-bird
For the clue wording “SEA BIRD,” Crossword-Dictionary reports the most common solutions include ERN (3), GULL (4), SKUA (4), TERN (4), PETREL (6), GANNET (6), and PUFFIN (6), plus longer options like CORMORANT (9), ALBATROSS (9), STORMYPETREL (12).
SEA BIRD Crossword Clue - 3-12 letters - https://crossword-dictionary.com/clue/sea-bird
Crossword Heaven shows “SEA BIRD” is commonly answered with TERN and GULL (4 and 4 letters respectively) in its clue/answer database.
SEA BIRD Crossword Clue - 3-12 letters (Crossword Heaven) - https://crosswordheaven.com/clues/sea-bird
Crosswordsolver.com’s clue page for “SEA BIRD” includes ERN (3) and TERN (4) among the accepted options, reinforcing that “sea bird” often targets specific small seabirds.
SEA BIRD crossword puzzle clue (Crossword Solver) - https://www.crosswordsolver.com/clue/SEA%20BIRD
For “AQUATIC BIRD,” Crossword-Dictionary lists common 4-letter answers like GULL, SWAN, LOON, ERNE, and TERN, and it also includes longer seabird/waterbird terms such as CORMORANT (9) and PELICAN (7), showing setters may treat “aquatic” as broad enough to include well-known seabirds.
AQUATIC BIRD Crossword Clue - 4-9 letters - https://crossword-dictionary.com/clue/aquatic-bird
For the clue “SHOREBIRD,” Crossword-Dictionary’s page indicates the most common solution is WADER (5), and it also associates shorebird-type answers with birds like TERN, GULL, PLOVER, AUK, and WADER—implying many “shore bird/shorebird” clues resolve to a category (often WADER) or to widely used shorthand seabird names.
SHOREBIRD Crossword Clue - 3-9 letters - https://crossword-dictionary.com/clue/shorebird
In Crossword-Dictionary’s “SEA BIRD” list, key marine-bird targets by common crossword spelling include: ERN (3), GULL (4), TERN (4), AUK (3), SKUA (4), GANNET (6), PUFFIN (6), CORMORANT (9), and ALBATROSS (9).
SEA BIRD Crossword Clue - 3-12 letters (Crossword-Dictionary: full list excerpt) - https://crossword-dictionary.com/clue/sea-bird
Crossword-Dictionary’s “AQUATIC BIRD” solutions include both seabirds and waterbirds with common crossword spellings: GULL (4), TERN (4), and CORMORANT (9), demonstrating that the setter’s intended answer is usually a standard dictionary/UK-accepted form, not a scientific or region-specific variant.
AQUATIC BIRD Crossword Clue - 4-9 letters (Crossword-Dictionary excerpt) - https://crossword-dictionary.com/clue/aquatic-bird
Oxford Learner’s Dictionaries gives the word origin for “gull” as late Middle English (Celtic origin; related to Welsh gwylan and Breton gwelan), which helps explain why “gull” is stable and not typically misspelled into close-looking variants in crosswords.
Oxford Learner’s Dictionaries: gull — definition + word origin - https://www.oxfordlearnersdictionaries.com/us/definition/english/gull
The entry distinguishes “gull” as a standard English form (not plural-only or alternate-spelling), which aligns with common crossword acceptance of the singular form GULL (4) for sea/shore/aquatic bird clues.
Oxford Learner’s Dictionaries: gull — definition + pronunciation/usage entry - https://www.oxfordlearnersdictionaries.com/us/definition/english/gull
Cambridge Dictionary provides pronunciation guidance for “gannet,” supporting the common crossword spelling GANNET and indicating where learners might mis-hear/spell it (e.g., confusing vowel patterns), even though crosswords typically require the fixed spelling GANNET.
Cambridge Dictionary: gannet — pronunciation - https://dictionary.cambridge.org/us/pronunciation/english/gannet
Britannica defines “cormorant” as a group of water birds (family Phalacrocoracidae), supporting that the crossword spelling CORMORANT (9) is the standard English bird-name form used in mainstream references.
Britannica: cormorant (animal) - https://www.britannica.com/animal/cormorant
Britannica Dictionary defines “cormorants” as the noun form for the bird, which helps solvers understand singular/plural regularity—crosswords most often use the singular CORMORANT for letter-count clues.
Britannica Dictionary: cormorants (definition) - https://www.britannica.com/dictionary/cormorants
Merriam-Webster provides etymology for “cormorant” tracing through Middle/Old French and Latin marīnus (“of the sea”), which helps explain why the spelling CORMORANT is consistent across US/UK English and commonly stays CORMORANT in crossword answers.
Merriam-Webster: cormorant — definition + etymology (Middle French/Old French/Latin path) - https://www.merriam-webster.com/dictionary/cormorant
Wiktionary notes the “sea/marine” component in the etymology for cormorant and mentions historical variant spellings (e.g., related early forms), which can contribute to why solvers sometimes try alternate spellings that are not crossword-standard.
Wiktionary: cormorant — etymology notes - https://en.wiktionary.org/wiki/cormorant
Wikipedia notes a historical spelling variant “corvorant” was sometimes used in the early 19th century, explaining a potential misspelling pattern—but the standard modern crossword form is CORMORANT.
Cormorant (Wikipedia) — spelling history note - https://en.wikipedia.org/wiki/Cormorant
Wikipedia states “gannet” is derived from Old English ganot, aligning with why the spelling GANNET is fixed and not commonly confused with GA(N)ET/GENET-like variants in accepted puzzles.
Gannet (Wikipedia) — etymology - https://en.wikipedia.org/wiki/Gannet
Wikipedia explains tern’s etymology via Latin/Old English links (Sterna/stearn), providing background on why the spelling TERN (4) is stable and typically accepted as-is in crosswords.
Tern (Wikipedia) — etymology - https://en.wikipedia.org/wiki/Tern
Crossword-Dictionary’s “SEA BIRD” page explicitly lists the common short equivalents solvers confuse: ERN (3), GULL (4), TERN (4), AUK (3), SKUA (4), plus longer cormorant/puffin/gannet options.
Sea bird Crossword Clue - 3-12 letters (Crossword-Dictionary) - https://crossword-dictionary.com/clue/sea-bird
Crossword-Dictionary’s “SHOREBIRD” entry points to WADER (5) as the typical answer, while also showing shorebird-like seabirds (TERN, GULL, AUK), clarifying a setter convention: “shorebird/shore bird” can be generic-category (WADER) or a specific shorthand bird-name depending on length constraints.
SHOREBIRD Crossword Clue - 3-9 letters (Crossword-Dictionary) - https://crossword-dictionary.com/clue/shorebird
For “AQUATIC BIRD,” the most common 4-letter answers include GULL and TERN; this explains a common substitution error: solvers swapping among GULL/TERN/ERNE/LOON when the clue uses “aquatic” rather than “sea/sea bird.”
AQUATIC BIRD Crossword Clue - 4-9 letters (Crossword-Dictionary) - https://crossword-dictionary.com/clue/aquatic-bird
Wikipedia notes terns’ close relationship to gulls and mentions related seabird groups (skuas/auks), which can be used by solvers as a “family resemblance” heuristic when clue wording is vague (and multiple bird-name answers seem plausible).
Tern (Wikipedia) — relationship to gulls/skuas/auks - https://en.wikipedia.org/wiki/Tern
In addition to the compact ‘gull/tern/ern/auk’ set, “SEA BIRD” in Crossword-Dictionary also accepts common puzzle spellings for bigger seabirds like PETREL (6), GANNET (6), PUFFIN (6), SKUA (4), CORMORANT (9), and ALBATROSS (9).
Crossword-Dictionary: SEA BIRD (full list excerpt) - https://crossword-dictionary.com/clue/sea-bird
The dedicated “MARINE BIRD” clue page (distinct from “SEA BIRD”) indicates that the setter/dictionary view is close to the same seabird-name cluster, but “marine” may bias toward seabird-specific answers rather than generic freshwater/wader terms.
Crossword-Dictionary: MARINE BIRD clue page - https://crossword-dictionary.com/clue/marine-bird
Collins’ official Scrabble publisher notes that their word list is comprehensive across English variants, supporting the general crossword convention that bird spellings like GULL/TERN/AUK/GANNET/PUFFIN/CORMORANT have stable dictionary spellings across regions.
Scrabble - Collins official Scrabble publisher (context for spelling stability) - https://www.collinsdictionary.com/us/scrabble/
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