Species · accepted · checked 2026-09-03

Sula dactylatra

Masked Booby

WoRMS 212599ITIS 174699key itis:174699

2026-09-03: worms_id 212599 via WoRMS TSN crosswalk (status accepted) 2026-09-04: worms_id 212599 matched by name "Sula dactylatra" 2026-09-04: itis_id 174699 via WoRMS external link

Silhouette · Jon Hill · CC BY-SA 3.0 · PhyloPic, drawn from Sula nebouxii

Masked Booby92 cm

bongo net ring71 cm

max · sealifebase

Photograph of Sula dactylatra — Photo · R Vasconcellos · CC BY 4.0 · inat

The masked booby, also called the masked gannet or the blue-faced booby, is a large seabird of the booby and gannet family, Sulidae. First described by the French naturalist René-Primevère Lesson in 1831, the masked booby is one of six species of booby in the genus Sula.W CalCOFI holds 3 observations of it in 1 dataset between 2022 and 2022.R

3
observations: 3
records: 3
sampling events: 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 3 obs · 3 events · 2022
name used: Sula dactylatra Masked Booby · code MABO

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:174699%22

Sula dactylatra

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/.