Gull-billed Tern
Gelochelidon nilotica
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusGelochelidon (Gull-billed Terns)
- SpeciesGelochelidon nilotica (Gull-billed Tern)
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
Caspian Tern
Hydroprogne caspia
Larus pipixcan
Leucophaeus pipixcan
Sooty Tern
Onychoprion fuscatus
Common Tern
Sterna hirundo
Spotted Sandpiper
Actitis macularius
📅 Monthly Probability
Fewer than 5 records of Gull-billed Tern at Sian Ka'an Biosphere Reserve — 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