Caspian Tern
Hydroprogne caspia
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusHydroprogne (Caspian Terns)
- SpeciesHydroprogne caspia (Caspian Tern)
The Caspian tern (Hydroprogne caspia) is the world's largest species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies. The genus name is from Ancient Greek hudro-, "water-", and Latin progne, "swallow". The specific caspia is from Latin and, like the English name, refers to the Caspian Sea. Wikipedia →
<5% of wildlife watchers report a Caspian Tern sighting in Sian Ka'an Biosphere Reserve, based on 7 days of visitor records from GBIF citizen-science data.
Closest Relatives at Sian Ka'an Biosphere Reserve
Royal Tern
Thalasseus maximus
Brown Noddy
Anous stolidus
Sandwich Tern
Thalasseus sandvicensis
Cabot's Tern
Thalasseus acuflavidus
Laughing Gull
Leucophaeus atricilla
Least Tern
Sternula antillarum
Black Tern
Chlidonias niger
Franklin's Gull
Leucophaeus pipixcan
Sooty Tern
Onychoprion fuscatus
Gull-billed Tern
Gelochelidon nilotica
Common Tern
Sterna hirundo
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 Sian Ka'an Biosphere Reserve?
About 0% of wildlife watchers report a Caspian Tern sighting in Sian Ka'an Biosphere Reserve, based on 7 days of visitor records from GBIF citizen-science data.
When is the best time to see Caspian Tern in Sian Ka'an Biosphere Reserve?
October has the highest sighting rate for Caspian Tern in Sian Ka'an Biosphere Reserve in our monthly data.