Onychoprion (Brown-backed Terns)

Genus

Brown-backed Terns

Onychoprion

3 species in our catalog · found in 38 parks

Species in this group

Each card shows the species at its best park — tap for the full profile

Sooty Tern
LC

Sooty Tern

☀️ Diurnal Bird

Onychoprion fuscatus

Daily sighting probability Insufficient data
Bridled Tern
LC

Bridled Tern

☀️ Diurnal Bird

Onychoprion anaethetus

Daily sighting probability ~10% · With luck
Aleutian Tern
VU

Aleutian Tern

☀️ Diurnal Bird

Onychoprion aleuticus

Daily sighting probability ~10% · With luck

Daily sighting probability by month

Probability-weighted average across the group's species

<5%
Jan
<5%
Feb
<5%
Mar
<5%
Apr
~10%
May
~10%
Jun
<5%
Jul
~10%
Aug
~10%
Sep
~10%
Oct
<5%
Nov
<5%
Dec

When they're spotted

When the group's species are recorded (aggregated)

☀️🌙🌙12am6am12pm6pm12am

Where to see Brown-backed Terns

Worldwide records of this group (human observations from 2019 onwards, GBIF). Pins mark our parks — tap one for the chance of seeing at least one species of the group there.

Parks Ranked

Chance of seeing at least one species of the group · number of its species present

#ParkCountrySpeciesDaily sighting probability
1 Celestún Biosphere Reserve 🇲🇽 Mexico 1
~10%
2 Raja Ampat 🇮🇩 Indonesia 3
~10%
3 Komodo National Park 🇮🇩 Indonesia 2
~10%
4 Coiba National Park 🇵🇦 Panama 2
~10%
5 Wrangell-St. Elias National Park 🇺🇸 United States 1
~10%
6 Arrecifes de Cozumel National Park 🇲🇽 Mexico 2
~10%
7 iSimangaliso Wetland Park 🇿🇦 South Africa 1
~10%
8 Ningaloo Marine Park 🇦🇺 Australia 2
<5%
9 Royal National Park 🇦🇺 Australia 1
<5%
10 Kruger National Park 🇿🇦 South Africa 1
<5%
11 Cabo Blanco Absolute Nature Reserve 🇨🇷 Costa Rica 2
<5%
12 Cape Range 🇦🇺 Australia 2
<5%
13 Manuel Antonio National Park 🇨🇷 Costa Rica 1
<5%
14 Isla del Coco National Park 🇨🇷 Costa Rica 1
<5%
15 Bako National Park 🇲🇾 Malaysia 1
<5%
16 Yala National Park 🇱🇰 Sri Lanka 1
<5%
17 Noosa National Park 🇦🇺 Australia 1
<5%
18 Galápagos Islands 🇪🇨 Ecuador 1
<5%
19 Katmai National Park 🇺🇸 United States 1
<5%
20 Daintree National Park 🇦🇺 Australia 2
<5%
21 Santa Rosa National Park 🇨🇷 Costa Rica 1
<5%
22 Jaragua National Park 🇩🇴 Dominican Republic 1
<5%
23 Las Baulas Marine National Park 🇨🇷 Costa Rica 1
<5%
24 Corcovado National Park 🇨🇷 Costa Rica 1
<5%
25 Kenai Fjords National Park 🇺🇸 United States 1
<5%
26 Machalilla National Park 🇪🇨 Ecuador 1
<5%
27 Bastimentos Island National Marine Park 🇵🇦 Panama 1
<5%
28 Kerinci Seblat National Park 🇮🇩 Indonesia 1
<5%
29 Sian Ka'an Biosphere Reserve 🇲🇽 Mexico 1
<5%
30 El Vizcaíno Biosphere Reserve 🇲🇽 Mexico 1
<5%
31 Ranomafana National Park 🇲🇬 Madagascar 1
<5%
32 Tsavo East National Park 🇰🇪 Kenya 1
<5%
33 Marino Ballena National Park 🇨🇷 Costa Rica 1
<5%
34 Everglades National Park 🇺🇸 United States 2
<5%
35 Ciénaga de Zapata 🇨🇺 Cuba 1
<5%
36 Big Cypress National Preserve 🇺🇸 United States 1
<5%
37 Darién National Park 🇵🇦 Panama 1
<5%
38 Braulio Carrillo National Park 🇨🇷 Costa Rica 1
<5%