Species · accepted · checked 2026-08-05

Puffinus opisthomelas

Black-Vented Shearwater

WoRMS 343988ITIS 554396key itis:554396

2026-08-05: worms_id 343988 via WoRMS TSN crosswalk (status accepted)

Silhouette · juan.jeri.vidal · CC0 1.0 · PhyloPic, drawn from Puffinus griseus

Black-Vented Shearwater38 cm

bongo net ring71 cm

max · sealifebase

A Black-vented Shearwater Puffinus opisthomelas off the coast of Northern California. — Photo · Cato Neimoidia · CC BY-SA 4.0 · commons

The black-vented shearwater is a species of seabird endemic to islands off of the Pacific coast of Mexico and the Gulf of California. It is a smaller shearwater, with a length of 30–38 cm, 76–89 cm wingspan and a mass of around 400 g.W CalCOFI holds 1,399 observations of it in 1 dataset between 1987 and 2022.R

1,399
observations: 1,399
records: 1,399
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 1,399 obs · 1,399 events · 1987–2022
name used: Puffinus opisthomelas Black-Vented Shearwater · code BVSH

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:554396%22

Puffinus opisthomelas

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/.