Chroicocephalus

Genusaccepted · checked 2026-08-06WoRMS 465357ITIS 823978key itis:823978

2026-08-06: worms_id 465357 via WoRMS TSN crosswalk (status accepted)

Chroicocephalus is a genus of medium to relatively small gulls which were included in the genus Larus until genetic evidence published in 2005 showed that Larus as then constituted was paraphyletic. Ten species are currently accepted.W CalCOFI holds 643 observations of it in 1 dataset between 1987 and 2022.R

643
observations: 643
records: 1987–2022
years: 1
datasets

Photo · JJ Harrison (https://www.jjharrison.com.au/) · CC BY-SA 3.0 · commons

Observed in nothing keyed to it directly

Every observation under it belongs to one of the taxa under it — 1 taxon, in the fold below.

Ways inExplorer db-query R Python This page as JSON

Code and endpoints R · Python · JSON

library(calcofi4r)
con <- cc_get_db()                      # the promoted release
tbl(con, "obs_bio") |> filter(taxon_key == "itis:823978")

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 not on record

Not on record: no authority the fetcher reads carries a length for this taxon (a genus page could show the range of its species).

Under it 1 taxon

sp Chroicocephalus philadelphia Bonaparte's Gull643

Lineage 10 ranks · Animalia to Laridae

Credits silhouette · photo · text

Silhouette · Michael Scroggie · CC0 1.0 · PhyloPic, drawn from Chroicocephalus novaehollandiae · source
Photo · JJ Harrison (https://www.jjharrison.com.au/) · CC BY-SA 3.0 · commons · source
Text · Wikipedia, “Chroicocephalus” · CC BY-SA 4.0 · revision 1355553780

Elsewhere Wikidata · iNaturalist · GBIF

Wikidata iNaturalist GBIF

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 ↗