Species · accepted · checked 2026-08-05

Stercorarius parasiticus

Parasitic Jaeger

WoRMS 137172ITIS 176793key itis:176793

2026-08-05: worms_id 137172 via WoRMS TSN crosswalk (status accepted)

Silhouette · Air Kebir NRG · CC BY-NC-SA 3.0 · PhyloPic, drawn from Stercorarius parasiticus

Parasitic Jaeger67 cm

bongo net ring71 cm

max · sealifebase

The arctic skua (Stercorarius parasiticus) is the most common skua on the Spitzbergen archipelago. About 1,000 breeding pairs reside on the islands. — Photo · AWeith · CC BY-SA 4.0 · commons

The parasitic jaeger or arctic skua, also known as the parasitic skua or arctic jaeger, is a seabird in the skua family Stercorariidae. It is a migratory species breeding in Northern Fennoscandia, Scotland, Iceland, Greenland, Northern Canada, Alaska, and Siberia and wintering across the southern hemisphere.W CalCOFI holds 270 observations of it in 1 dataset between 1987 and 2022.R

270
observations: 270
records: 270
sampling events: 1987–2022
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.

Seabirds & Marine Mammals 270 obs · 270 events · 1987–2022
name used: Stercorarius parasiticus Parasitic Jaeger · code PAJA

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/.

Explorer db-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:176793%22

Stercorarius parasiticus

How big is itiEvery 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

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

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.

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/.