Snowy-crowned Tern

Sterna trudeaui Audubon, 1838

153 gWeight

The snowy-crowned tern (Sterna trudeaui), also known as Trudeau's tern, is a species of bird in subfamily Sterninae of the family Laridae, the gulls, terns, and skimmers.

Busiest months: October · Most records: Uruguay, Chile, Argentina

Least Concern

Where and when it's recorded

Busiest months: October · Most records: Uruguay, Chile, Argentina

Snowy-crowned Tern has been recorded at 111 of the 8,276 birding hotspots we track, in 4 countries and regions.

Records by month Southern Hemisphere

Where it's recorded most

SN Humedal Río Maipo – DesembocaduraChile1,500 records
Faro Punta CarretasUruguay790 records
Reserva Ecológica Costanera SurArgentina785 records

More places

Reserva Natural Municipal Punta RasaArgentina777 records
Reserva Natural Playa PeninoUruguay681 records
Mar ChiquitaArgentina649 records
Laguna José Ignacio – Área sur y DesembocaduraUruguay476 records
PP Laguna de Rocha – Zona Sur y BarraUruguay442 records
Pichilemu – Laguna PetrelChile396 records
Punta del ChilenoUruguay377 records

Countries and regions with the most records

Uruguay Chile Argentina Brazil

eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.

About

The snowy-crowned tern (Sterna trudeaui), also known as Trudeau's tern, is a species of bird in subfamily Sterninae of the family Laridae, the gulls, terns, and skimmers. It is native to Argentina, Brazil, Chile, Uruguay, and possibly Paraguay, and also vagrant in Peru and the Falkland Islands.

Excerpt from Wikipedia, CC BY-SA 4.0 · authors · Read more on Wikipedia

Questions

How big is the Snowy-crowned Tern?

The Snowy-crowned Tern weighs around 153 g.

Where does the Snowy-crowned Tern live?

Its breeding range: South America: coastal southeastern Brazil and Uruguay to inland east-central Argentina; coastal Aconcagua to Llanquihue provinces (central, south-central Chile). It is most often recorded in Uruguay, Chile and Argentina.

When is the best time to see the Snowy-crowned Tern?

At the hotspots we track, it is recorded most in October (Southern Hemisphere).

Is the Snowy-crowned Tern endangered?

The IUCN Red List classifies the Snowy-crowned Tern as Least Concern.

What does the Snowy-crowned Tern eat?

Main food: Fish, shrimp & shellfish.

What family is the Snowy-crowned Tern in?

It belongs to the family Gulls, Terns, Skimmers (Laridae), order Charadriiformes.

At a glance

Weight: 153 g
Habitat: Wetland
Diet: Fish, shrimp & shellfish
Lifestyle: Feeds in the air
Migration: Partial migrant
Conservation: Least Concern

More measurements

Wing: 256 mm
Tail: 133 mm
Bill: 48 mm
Tarsus: 24 mm

Averages from the AVONET dataset; length from field guides where available.

Range

South America: coastal southeastern Brazil and Uruguay to inland east-central Argentina; coastal Aconcagua to Llanquihue provinces (central, south-central Chile)

Breeding range, IOC World Bird List 15.2