Leucocarbo atriceps
Silhouette: Edwin Price · PhyloPic
In 3 days >90%
The imperial shag or imperial cormorant (Leucocarbo atriceps) is a black-and-white cormorant native to southern South America, islands of the Subantarctic, and the Antarctic Peninsula, primarily in rocky coastal regions, but locally also at large inland lakes. Some taxonomic authorities, including the International Ornithologists' Union, place it in the genus Leucocarbo, others in the genus Phalacrocorax. It is also known as the blue-eyed shag, blue-eyed cormorant and by many other names, and is one of a larger group of cormorants called blue-eyed shags. The taxonomy is complex, and several types are treated as either subspecies or separate species.
The imperial shag was formally described in 1828 by the Royal Navy officer Phillip Parker King based on a specimen that he had collected in the Strait of Magellan of southern Chile. He placed the species in the genus Phalacrocorax and coined the binomial name Phalacrocorax atriceps, where the specific epithet combines the Latin ater meaning "black" with -ceps meaning "-capped" or "-headed". The imperial shag was formerly usually retained in the genus Phalacrocorax, but has also sometimes been placed in its own genus Notocarbo... Wikipedia →
Call0:43
United Kingdom · 2013
© Michele Peron · XC187942 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Península Valdés | 🇦🇷 Argentina | |
| 2 | Tierra del Fuego National Park | 🇦🇷 Argentina | |
| 3 | Nahuel Huapi National Park | 🇦🇷 Argentina |
Very likely
About 70% of wildlife watchers report an Imperial Shag sighting in Península Valdés on a given day, based on 374 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 9th most-seen of the 96 birds we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
April
In that month about 90% of wildlife watchers report an Imperial Shag in Península Valdés on a given day, against about 40% in October, the lowest month. June and July have too few records to rate.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Imperial Shag sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate Imperial Shag sightings, Península Valdés has the highest daily chance: about 70%. Next come Tierra del Fuego National Park (Argentina, about 50%) and Nahuel Huapi National Park (Argentina, under 5%).
Same family: Phalacrocoracidae
The closest relatives of the Imperial Shag that you can see in Península Valdés (family Phalacrocoracidae, Cormorants and Shags) are Bigua cormorant (about 80%) and Magellanic Cormorant (about 60%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Imperial Shag is recorded against all the birds logged in Península Valdés (374 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
