Larus hyperboreus
Silhouette: Sharon Wegner-Larsen · PhyloPic
In 3 days <5%
The glaucous gull (Larus hyperboreus) is a large gull, the second-largest gull in the world. The genus name is from Latin larus, which appears to have referred to a gull or other large seabird. The specific name hyperboreus is Latin for "northern" from the Ancient Greek Huperboreoi people from the far north "Glaucous" is from Latin glaucus and denotes the grey colour of the gull. An older English name for this species is burgomaster.
This gull breeds in Arctic regions of the Northern Hemisphere and winters south to shores of the Holarctic. It is migratory, wintering from in the North Atlantic and North Pacific Oceans as far south as the British Isles and northernmost states of the United States, also on the Great Lakes. A few birds sometimes reach the southern USA and northern Mexico.
This is a large and powerful gull, second-largest of all gull species and very pale in all plumage, with no black on either the wings or the tail. Adults are pale grey above, with a thick, yellow bill. Juveniles are very pale grey with a pink and black bill. This species is considerably larger, bulkier, and thicker-billed than the similar Iceland gull, and can sometimes... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Svalbard | 🇳🇴 Norway | |
| 2 | Vatnajokull National Park | 🇮🇸 Iceland | |
| 3 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 4 | Gros Morne National Park | 🇨🇦 Canada | |
| 5 | Redwood National Park | 🇺🇸 United States | |
| 6 | Great Bear Rainforest | 🇨🇦 Canada | |
| 7 | Wadden Sea National Park | 🇩🇪 Germany | |
| 8 | Point Pelee National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | Moscow | 🇷🇺 Russia | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | Birmingham | 🇬🇧 United Kingdom | |
| 5 | Vancouver | 🇨🇦 Canada | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | Calgary | 🇨🇦 Canada | |
| 8 | Seoul | 🇰🇷 South Korea | |
| 9 | New York City | 🇺🇸 United States | |
| 10 | Tokyo | 🇯🇵 Japan |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Caldwell Zoo | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Glaucous Gull sighting in Denver on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 289th most-seen of the 299 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Glaucous Gull in Denver on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Glaucous Gull sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 18 cities where we can rate Glaucous Gull sightings, Denver ranks 18th at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%), Moscow (Russia, under 5%) and Dallas (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Glaucous Gull is recorded against all the birds logged in Denver (5 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
