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Species · accepted · checked 2026-08-05

Cerorhinca monocerata

Rhinoceros Auklet

WoRMS 344029ITIS 177023key itis:177023
i

2026-08-05: worms_id 344029 via WoRMS TSN crosswalk (status accepted)

Silhouette · Andy Wilson · CC0 1.0 · PhyloPic, drawn from Cerorhinca monocerata
Rhinoceros Auklet38 cm
bongo net ring71 cm

max · sealifebase

Photograph of Cerorhinca monocerata
Photo · Anastasiia Merkulova · CC BY-NC 4.0 · inat NC

The rhinoceros auklet is a seabird and a close relative of the puffins. It is the only extant species of the genus Cerorhinca.W CalCOFI holds 1,202 observations of it in 1 dataset between 1987 and 2022.R

1,202
observations
1,202
records
1,202
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 1,202 obs · 1,202 events · 1987–2022
    name used: Cerorhinca monocerata Rhinoceros Auklet · code RHAU

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/.

Explorerdb-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:177023%22