CalCOFI.io CalCOFI.io open data ecosystem

Stercorariidae

skuas

Familyaccepted · checked 2026-08-05WoRMS 136990ITIS 176790key itis:176790
i

2026-08-05: worms_id 136990 via WoRMS TSN crosswalk (status accepted)

The skuas are a group of predatory and kleptoparasitic seabirds with seven species forming the genus Stercorarius, the only genus in the family Stercorariidae. The three smaller skuas, the Arctic skua, the long-tailed skua, and the pomarine skua, are called jaegers in North American English.W CalCOFI holds 1,380 observations of it in 1 dataset between 1987 and 2022, across 4 taxa under it.R

1,380
observations
1,380
records
1987–2022
years
1
datasets
4
species under it
Photograph of Stercorariidae
Photo · Kimberley Collins · CC BY 4.0 · inat

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 inExplorerdb-queryRPythonThis page as JSON

Code and endpoints R · Python · JSON
R
library(calcofi4r)
con <- cc_get_db()                      # the promoted release
tbl(con, "obs_bio") |> filter(taxon_key == "itis:176790")

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
Lineage 9 ranks · Animalia to Charadriiformes
Credits silhouette · photo · text
  • Silhouette · albertonykus · CC BY-SA 3.0 · PhyloPic, drawn from Stercorarius antarcticus · source
  • Photo · Kimberley Collins · CC BY 4.0 · inat · source
  • Text · Wikipedia, “Skua” · CC BY-SA 4.0 · revision 1366732202
Elsewhere Wikidata · iNaturalist · GBIF

WikidataiNaturalistGBIF

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 ↗