Sandwich Tern
Thalasseus sandvicensis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusThalasseus (Crested Terns)
- SpeciesThalasseus sandvicensis (Sandwich Tern)
Closest Relatives at Białowieża National Park
Black-headed Gull
Chroicocephalus ridibundus
Common Tern
Sterna hirundo
Whiskered Tern
Chlidonias hybrida
Black Tern
Chlidonias niger
Caspian Gull
Larus cachinnans
White-winged Tern
Chlidonias leucopterus
Common Gull
Larus canus
Little Gull
Hydrocoloeus minutus
Caspian Tern
Hydroprogne caspia
Lesser Black-backed Gull
Larus fuscus
Little Tern
Sternula albifrons
European Herring Gull
Larus argentatus
📅 Monthly Probability
Fewer than 5 records of Sandwich Tern at Białowieża National Park — not enough to chart months honestly.
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there