Species · accepted · checked 2026-08-06

Hydroprogne caspia

Caspian Tern

WoRMS 567825ITIS 176935key itis:176935

2026-08-06: worms_id 567825 via WoRMS TSN crosswalk (status accepted) 2026-08-05: worms_id 567825 via WoRMS TSN crosswalk (status accepted); WoRMS Sterna caspia unaccepted -> Hydroprogne caspia; itis:176924 deprecated in ITIS -> itis:176935 (Hydroprogne caspia)

Silhouette · Andy Wilson · CC0 1.0 · PhyloPic, drawn from Hydroprogne caspia

Caspian Tern59 cm

bongo net ring71 cm

max · sealifebase

Photograph of Hydroprogne caspia — Photo · Jef-B · CC BY-NC 4.0 · inat NC

The Caspian tern is the world's largest species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies.W CalCOFI holds 95 observations of it in 1 dataset between 1987 and 2022.R

95
observations: 95
records: 95
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 95 obs · 95 events · 1987–2022
name used: Hydroprogne caspia Caspian Tern · code CATE re-keyed

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:176935%22

Hydroprogne caspia

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/.