CalCOFI.io CalCOFI.io open data ecosystem
Species · accepted · checked 2026-08-05

Larus hyperboreus

Glaucous Gull

WoRMS 137145ITIS 176808key itis:176808
i

2026-08-05: worms_id 137145 via WoRMS TSN crosswalk (status accepted)

Silhouette · Sharon Wegner-Larsen · CC0 1.0 · PhyloPic, drawn from Larus argentatus
Glaucous Gull77 cm
bongo net ring71 cm

max · sealifebase

Glaucus gulls (Larus hyperboreus) are the biggest gull species on Svalbard; they usually take over the functions of raptors in this region. Some thousand bird couples are breeding on the archipelago i
Photo · AWeith · CC BY-SA 4.0 · commons

The glaucous gull 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.W CalCOFI holds 4 observations of it in 1 dataset between 2000 and 2005.R

4
observations
4
records
4
sampling events
2000–2005
years
1
datasets

Observed in
i

One row per dataset, one cell per year, darker with more observations — the same strip the front door draws per dataset. Each row ends with the name that dataset uses (dataset_taxon); the accepted name is written once, in the title above. A quiet pill marks a name the authority does not accept.

How big is it
i

Every mark is a measured length with its own source — hover one to read it. The reference objects are _data/size_reference.csv: two of them, the 505 µm bongo mesh and the net's ring, are CalCOFI's own sampling gear.

Groups

calcofi:seabirds

Ways in
i

Read from taxa.json of release v2026.09.11, written at release by calcofi4db::build_taxa_catalog(). The catalog's index is /species/.

Explorerdb-query
ERDDAPCalCOFI's own server, the Seabirds & Marine Mammals table constrained to this taxon
https://erddap.calcofi.io/erddap/tabledap/farallon_bird-mammal.html?&taxon_key=%22itis:176808%22