Common Tern
Sterna hirundo
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusSterna (Typical Terns)
- SpeciesSterna hirundo (Common Tern)
Closest Relatives at Snowdonia National Park
Arctic Tern
Sterna paradisaea
European Herring Gull
Larus argentatus
Black-headed Gull
Chroicocephalus ridibundus
Lesser Black-backed Gull
Larus fuscus
Great Black-backed Gull
Larus marinus
Common Gull
Larus canus
Iceland Gull
Larus glaucoides
Sandwich Tern
Thalasseus sandvicensis
Mediterranean Gull
Ichthyaetus melanocephalus
Black-legged Kittiwake
Rissa tridactyla
Little Tern
Sternula albifrons
Yellow-legged Gull
Larus michahellis
📅 Monthly Probability
☀️ 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
Parks Where Found
Quick answers
What are the chances of seeing a Common Tern in Snowdonia National Park?
About 1% of visitor-days record a Common Tern sighting in Snowdonia National Park, based on 16 observer-days of citizen-science data from GBIF.
When is the best time to see Common Tern in Snowdonia National Park?
September has the highest sighting rate for Common Tern in Snowdonia National Park in our monthly data.