Larus delawarensis
Ring-Billed Gull
i
2026-08-05: worms_id 148797 via WoRMS TSN crosswalk (status accepted)
The ring-billed gull is a medium-sized gull native to North America, breeding in Canada and the northern Contiguous United States, and wintering mainly in the United States and northern Mexico. The genus name is from Latin Larus which appears to have referred to a gull or other large seabird.W CalCOFI holds 200 observations of it in 1 dataset between 1987 and 2022.R
- 200
- observations
- 200
- records
- 200
- sampling events
- 1987–2022
- years
- 1
- datasets
- 53 cm
- max length
Observed in 1 dataseti
One row per dataset, and beside it 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.
i
One row per dataset, and beside it 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.
-
name used: Larus delawarensis Ring-Billed Gull · code
RBGU
Ways inExplorerdb-queryERDDAPRPythonThis page as JSON
Code and endpoints ERDDAP · R · Python · JSON
library(calcofi4r) con <- cc_get_db() # the promoted release tbl(con, "obs_bio") |> filter(taxon_key == "itis:176830")
import calcofi4py as cc
con = cc.cc_get_db()
con.sql("SELECT * FROM obs_bio WHERE taxon_key = 'itis:176830'").df()Read from taxa.json of release v2026.10.21, written at release by calcofi4db::build_taxa_catalog(). The catalog's index is /species/.
How big is it 53 cm max
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.
Lineage 11 ranks · Animalia to Larus
Credits silhouette · photo · text · length
- Silhouette · Jason Dilworth · CC0 1.0 · PhyloPic, drawn from Larus delawarensis · source
- Photo · Eric Schmidt · CC BY 4.0 · inat · source
- Text · Wikipedia, “Ring-billed gull” · CC BY-SA 4.0 · revision 1349256403
- Length · sealifebase
Elsewhere Wikidata · iNaturalist · GBIF · eBird
The same organism on the services the faces were fetched from; the authorities' own pages are the ids in the head.
Cite the release, v2026.10.21
Cite the release, v2026.10.21; each dataset's own citation, licence and DOI are on its page. How to cite ↗