Giant Cowbird
Giant CowbirdGiant CowbirdGiant Cowbird

Giant Cowbird

Molothrus oryzivorus

Silhouette: Andy Wilson · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~10% · With luck
at Tambopata National Reserve
617 Verified sightings at Tambopata National Reserve From 2019 to 2026
8,184 Verified sightings across all 64 parks From 2019 to 2026
September Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Giant Cowbird

The giant cowbird (Molothrus oryzivorus) is a large passerine bird in the New World family Icteridae. It breeds from southern Mexico south to northern Argentina, and on Trinidad and Tobago. It may have relatively recently colonised the latter island. It is a brood parasite and lays its eggs in the nests of other birds.

The giant cowbird was formally described in 1788 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the orioles in the genus Oriolus and coined the binomial name Oriolus oryzivorus. Gmelin based his account on the "rice bird" from Cayenne that had been described in 1782 by the English ornithologist John Latham in his multi-volume work A General Synopsis of Birds. The specific epithet is from Latin oryza meaning "rice" and -vorus meaning "eating". The giant cowbird is now one of six cowbirds placed in the genus Molothrus that was introduced in 1832 by William Swainson.

Two subspecies are recognised: M. o. impacifus (Peters, JL, 1929) – east Mexico to west Panama M. o. oryzivorus (Gmelin, JF, 1788) – central Panama to Peru, Bolivia and north Argentina Wikipedia →

Closest Relatives at Tambopata National Reserve

Shiny Cowbird
LC

Shiny Cowbird

☀️ Diurnal Bird

Molothrus bonariensis

Daily sighting probability <5% · Rare
Russet-backed Oropendola
LC

Russet-backed Oropendola

☀️ Diurnal Bird

Psarocolius angustifrons

Daily sighting probability ~40% · Likely
Yellow-rumped Cacique
LC

Yellow-rumped Cacique

☀️ Diurnal Bird

Cacicus cela

Daily sighting probability ~40% · Likely
Crested Oropendola
LC

Crested Oropendola

☀️ Diurnal Bird

Psarocolius decumanus

Daily sighting probability ~30% · Possible
Olive Oropendola
LC

Olive Oropendola

☀️ Diurnal Bird

Psarocolius bifasciatus

Daily sighting probability ~20% · Possible
Epaulet Oriole
LC

Epaulet Oriole

☀️ Diurnal Bird

Icterus cayanensis

Daily sighting probability ~10% · With luck
Orange-backed Oriole
LC

Orange-backed Oriole

☀️ Diurnal Bird

Icterus icterus

Daily sighting probability ~10% · With luck
Casqued Cacique

Casqued Cacique

☀️ Diurnal Bird

Psarocolius oseryi

Daily sighting probability ~10% · With luck
Solitary Black Cacique
LC

Solitary Black Cacique

☀️ Diurnal Bird

Cacicus solitarius

Daily sighting probability <5% · Rare
Red-breasted Blackbird
LC

Red-breasted Blackbird

☀️ Diurnal Bird

Sturnella militaris

Daily sighting probability <5% · Rare
Red-rumped Cacique
LC

Red-rumped Cacique

☀️ Diurnal Bird

Cacicus haemorrhous

Daily sighting probability <5% · Rare
Pale-eyed Blackbird
LC

Pale-eyed Blackbird

☀️ Diurnal Bird

Agelasticus xanthophthalmus

Daily sighting probability <5% · Rare

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Main Ridge Forest Reserve 🇹🇹 Trinidad and Tobago
~40%
2 Noel Kempff Mercado National Park 🇧🇴 Bolivia
~20%
3 Cuyabeno Wildlife Reserve 🇪🇨 Ecuador
~20%
4 Yasuní National Park 🇪🇨 Ecuador
~20%
5 Darién National Park 🇵🇦 Panama
~20%
6 Tambopata National Reserve 🇵🇪 Peru
~10%
7 San Lorenzo Protected Forest 🇵🇦 Panama
~10%
8 Iguaçu National Park 🇧🇷 Brazil
~10%
9 Madidi National Park 🇧🇴 Bolivia
~10%
10 Parque Estadual Encontro das Águas 🇧🇷 Brazil
~10%
11 Iguazú National Park 🇦🇷 Argentina
~10%
12 Chapada dos Guimarães National Park 🇧🇷 Brazil
~10%
13 Cordillera Azul National Park 🇵🇪 Peru
~10%
14 Manu National Park 🇵🇪 Peru
~10%
15 Amacayacu National Natural Park 🇨🇴 Colombia
~10%
16 Sierra de la Macarena National Park 🇨🇴 Colombia
~10%
17 Lago de Yojoa 🇭🇳 Honduras
~10%
18 Bastimentos Island National Marine Park 🇵🇦 Panama
~10%
19 Serra da Canastra National Park 🇧🇷 Brazil
~10%
20 Pico Bonito National Park 🇭🇳 Honduras
~10%
21 La Amistad International Park (Panama) 🇵🇦 Panama
~10%
22 Tikal National Park 🇬🇹 Guatemala
~10%
23 Cusuco National Park 🇭🇳 Honduras
<5%
24 Gandoca-Manzanillo Wildlife Refuge 🇨🇷 Costa Rica
<5%
25 Anavilhanas National Park 🇧🇷 Brazil
<5%
26 Soberanía National Park 🇵🇦 Panama
<5%
27 Cerro Azul Meámbar National Park 🇭🇳 Honduras
<5%
28 Manuel Antonio National Park 🇨🇷 Costa Rica
<5%
29 Tortuguero National Park 🇨🇷 Costa Rica
<5%
30 Machalilla National Park 🇪🇨 Ecuador
<5%
31 Puracé National Natural Park 🇨🇴 Colombia
<5%
32 Braulio Carrillo National Park 🇨🇷 Costa Rica
<5%
33 Cockscomb Basin Wildlife Sanctuary 🇧🇿 Belize
<5%
34 Amboró National Park 🇧🇴 Bolivia
<5%
35 Henri Pittier National Park 🇻🇪 Venezuela
<5%
36 Montes Azules Biosphere Reserve 🇲🇽 Mexico
<5%
37 Arenal Volcano National Park 🇨🇷 Costa Rica
<5%
38 Piedras Blancas National Park 🇨🇷 Costa Rica
<5%
39 Podocarpus National Park 🇪🇨 Ecuador
<5%
40 Caroni Swamp 🇹🇹 Trinidad and Tobago
<5%
41 Itatiaia National Park 🇧🇷 Brazil
<5%
42 Los Nevados National Natural Park 🇨🇴 Colombia
<5%
43 Rincón de la Vieja National Park 🇨🇷 Costa Rica
<5%
44 Tayrona National Natural Park 🇨🇴 Colombia
<5%
45 Chagres National Park 🇵🇦 Panama
<5%
46 Farallones de Cali National Natural Park 🇨🇴 Colombia
<5%
47 Chingaza National Natural Park 🇨🇴 Colombia
<5%
48 Tapantí-Macizo de la Muerte National Park 🇨🇷 Costa Rica
<5%
49 Chirripó National Park 🇨🇷 Costa Rica
<5%
50 Tenorio Volcano National Park 🇨🇷 Costa Rica
<5%
51 Carara National Park 🇨🇷 Costa Rica
<5%
52 Marino Ballena National Park 🇨🇷 Costa Rica
<5%
53 Monteverde Cloud Forest Reserve 🇨🇷 Costa Rica
<5%
54 Corcovado National Park 🇨🇷 Costa Rica
<5%
55 Celaque National Park 🇭🇳 Honduras
Insufficient data
56 Los Quetzales National Park 🇨🇷 Costa Rica
Insufficient data
57 Utría National Natural Park 🇨🇴 Colombia
Insufficient data
58 Brownsberg Nature Park 🇸🇷 Suriname
Insufficient data
59 Iberá National Park 🇦🇷 Argentina
Insufficient data
60 Cahuita National Park 🇨🇷 Costa Rica
Insufficient data
61 Cañón del Sumidero National Park 🇲🇽 Mexico
Insufficient data
62 Parque Natural Metropolitano 🇵🇦 Panama
Insufficient data
63 Palo Verde National Park 🇨🇷 Costa Rica
Insufficient data
64 Tijuca National Park 🇧🇷 Brazil
Insufficient data

Quick answers

What are the chances of seeing a Giant Cowbird in Tambopata National Reserve?

About 10% of wildlife watchers report a Giant Cowbird sighting in Tambopata National Reserve, based on 617 verified sightings from GBIF citizen-science data.

When is the best time to see Giant Cowbird in Tambopata National Reserve?

September has the highest sighting rate for Giant Cowbird in Tambopata National Reserve in our monthly data.

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