Arctic Tern
Sterna paradisaea
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusSterna (Typical Terns)
- SpeciesSterna paradisaea (Arctic Tern)
The Arctic tern (Sterna paradisaea) is a tern in the family Laridae. This bird has a circumpolar breeding distribution covering the Arctic and subarctic regions of Europe (as far south as Brittany), Asia, and North America (as far south as Massachusetts). The species is strongly migratory, seeing two summers each year as it migrates along a convoluted route from its northern breeding grounds to the Antarctic coast for the southern summer and back again about six months later. Recent studies have shown average annual round-trip lengths of about 70,900 km (38,300 nmi) for birds nesting in Iceland and Greenland, and about 48,700 km (26,300 nmi) for birds nesting in the Netherlands, while an individual from the Farne Islands in Northumberland with a light level geolocator tag covered a staggering 96,000 km (52,000 nmi) in ten months from the end of one breeding season to the start of the next. These are by far the longest migrations known in the animal kingdom. Arctic terns are medium-sized birds. Wikipedia →
Closest Relatives at Table Mountain National Park
Common Tern
Sterna hirundo
Antarctic Tern
Sterna vittata
Dominican Gull
Larus dominicanus
Hartlaub's Gull
Chroicocephalus hartlaubii
Crested Tern
Thalasseus bergii
Sandwich Tern
Thalasseus sandvicensis
Grey-hooded Gull
Chroicocephalus cirrocephalus
Caspian Tern
Hydroprogne caspia
White-winged Tern
Chlidonias leucopterus
Black-headed Gull
Chroicocephalus ridibundus
Elegant Tern
Thalasseus elegans
Whiskered Tern
Chlidonias hybrida
📅 Monthly Probability
Fewer than 5 records of Arctic Tern at Table Mountain 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