Large-billed Tern
Large-billed TernLarge-billed TernLarge-billed TernLarge-billed Tern

Large-billed Tern

Phaetusa simplex

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
5–10% · With luck
overall probability at Cuyabeno Wildlife Reserve
369 Verified records at Cuyabeno Wildlife Reserve
September Best month highest sighting rate
☀️ Diurnal When it's active during daytime hours (6am–6pm)

The large-billed tern (Phaetusa simplex) is a species of tern in the family Laridae. It is placed the monotypic genus Phaetusa. It is found in most of South America (east of the Andes and north of the Pampas). It has occurred as a vagrant in Aruba, Bermuda, Cuba, Panama and the United States. Its natural habitats are rivers and freshwater lakes. Wikipedia →

5–10% of wildlife watchers report a Large-billed Tern sighting in Cuyabeno Wildlife Reserve, based on 369 days of visitor records from GBIF citizen-science data.

Closest Relatives at Cuyabeno Wildlife Reserve

Black Skimmer
LC

Black Skimmer

☀️ Diurnal Bird

Rynchops niger

5–10% · With luck
Yellow-billed Tern
LC

Yellow-billed Tern

☀️ Diurnal Bird

Sternula superciliaris

5–10% · Rare
Laughing Gull
LC

Laughing Gull

☀️ Diurnal Bird

Leucophaeus atricilla

<5% · Rare
Spotted Sandpiper
LC

Spotted Sandpiper

☀️ Diurnal Bird

Actitis macularius

20–30% · Possible
Southern Lapwing
LC

Southern Lapwing

☀️ Diurnal Bird

Vanellus chilensis

20–30% · Possible
Wattled Jacana
LC

Wattled Jacana

☀️ Diurnal Bird

Jacana jacana

10–20% · With luck
Pied Lapwing

Pied Lapwing

☀️ Diurnal Bird

Hoploxypterus cayanus

5–10% · With luck
Greater Yellowlegs
NT

Greater Yellowlegs

☀️ Diurnal Bird

Tringa melanoleuca

5–10% · With luck
Solitary Sandpiper
LC

Solitary Sandpiper

☀️ Diurnal Bird

Tringa solitaria

<5% · Rare
Pectoral Sandpiper
LC

Pectoral Sandpiper

☀️ Diurnal Bird

Calidris melanotos

<5% · Rare
Lesser Yellowlegs
VU

Lesser Yellowlegs

☀️ Diurnal Bird

Tringa flavipes

<5% · Rare
Least Sandpiper
NT

Least Sandpiper

☀️ Diurnal Bird

Calidris minutilla

<5% · Rare

📅 Monthly Probability

5–10
Jan
5–10
Feb
10–20
Mar
<5
Apr
<5
May
<5
Jun
5–10
Jul
10–20
Aug
10–20
Sep
5–10
Oct
5–10
Nov
5–10
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

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

# Park Country Probability
1 Noel Kempff Mercado National Park 🇧🇴 Bolivia
50–60%
2 Parque Estadual Encontro das Águas 🇧🇷 Brazil
40–50%
3 Amacayacu National Natural Park 🇨🇴 Colombia
30–40%
4 Anavilhanas National Park 🇧🇷 Brazil
20–30%
5 Iberá National Park 🇦🇷 Argentina
20–30%
6 Tambopata National Reserve 🇵🇪 Peru
10–20%
7 Caroni Swamp 🇹🇹 Trinidad and Tobago
10–20%
8 Cuyabeno Wildlife Reserve 🇪🇨 Ecuador
5–10%
9 Manu National Park 🇵🇪 Peru
5–10%
10 El Palmar National Park 🇦🇷 Argentina
5–10%
11 Madidi National Park 🇧🇴 Bolivia
5–10%
12 Yasuní National Park 🇪🇨 Ecuador
5–10%
13 El Impenetrable National Park 🇦🇷 Argentina
5–10%
14 Sierra de la Macarena National Park 🇨🇴 Colombia
5–10%
15 Cordillera Azul National Park 🇵🇪 Peru
<5%
16 Amboró National Park 🇧🇴 Bolivia
<5%
17 Henri Pittier National Park 🇻🇪 Venezuela
<5%
18 Canaima National Park 🇻🇪 Venezuela
<5%
19 Tayrona National Natural Park 🇨🇴 Colombia
<5%
20 Machalilla National Park 🇪🇨 Ecuador
Insufficient data
21 Darién National Park 🇵🇦 Panama
Insufficient data
22 Iguaçu National Park 🇧🇷 Brazil
Insufficient data
23 Iguazú National Park 🇦🇷 Argentina
Insufficient data

Quick answers

What are the chances of seeing a Large-billed Tern in Cuyabeno Wildlife Reserve?

About 9% of wildlife watchers report a Large-billed Tern sighting in Cuyabeno Wildlife Reserve, based on 369 days of visitor records from GBIF citizen-science data.

When is the best time to see Large-billed Tern in Cuyabeno Wildlife Reserve?

September has the highest sighting rate for Large-billed Tern in Cuyabeno Wildlife Reserve in our monthly data.

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