Caspian Tern
Hydroprogne caspia
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusHydroprogne (Caspian Terns)
- SpeciesHydroprogne caspia (Caspian Tern)
Closest Relatives at Glacier National Park
Ring-billed Gull
Larus delawarensis
California Gull
Larus californicus
American Herring Gull
Larus smithsonianus
Black Tern
Chlidonias niger
Bonaparte's Gull
Chroicocephalus philadelphia
Iceland Gull
Larus glaucoides
Short-billed Gull
Larus brachyrhynchus
Larus pipixcan
Leucophaeus pipixcan
Lesser Black-backed Gull
Larus fuscus
Forster's Tern
Sterna forsteri
Glaucous Gull
Larus hyperboreus
Spotted Sandpiper
Actitis macularius
📅 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 Caspian Tern in Glacier National Park?
About 0% of visitor-days record a Caspian Tern sighting in Glacier National Park, based on 11 observer-days of citizen-science data from GBIF.
When is the best time to see Caspian Tern in Glacier National Park?
July has the highest sighting rate for Caspian Tern in Glacier National Park in our monthly data.