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WHO ARE WE?

The Osa Biodiversity Survey (OBS) is a community of naturalists dedicated to
cataloguing the flora and fauna of the Osa Peninsula, Costa Rica. The OBS is
instrumental in enhancing the collection of Osa’s biodiversity records; these
range from mini-fauna to rare and endemic species, and even apex predators. This
region-wide monitoring effort will help guide future conservation and
restoration efforts in one of the last wild places on our planet.





EXPLORE OSA’S BIODIVERSITY

Find out what biodiversity can be seen in the Osa Peninsula, who has the most
observations, which protected area has the most species, and which species are
the most observed. Best of all, explore live leaderboards, maps and images to
find out which species still need to be recorded and help us find them!
Contribute to the OBS and climb the rankings.





BECOME AN OBSERVER!

Join the OBS and become a citizen scientist. Create an account at
inaturalist.org or download the app on your phone. Follow the Osa Biodiversity
Survey project and help monitor the Osa Peninsula’s biodiversity. Get outside
and upload your observations to iNaturalist. Watch your observations appear on
this page, and contribute to the vital long-term monitoring of this unique
landscape – we can’t do it without you!




SIGN UP

To get involved, create an account at inaturalist.org. Start exploring and see
your observations appear here!


DISCOVER MORE






What is the Amistosa Biodiversity Survey?


Like the OBS, the Amistosa Biodiversity Survey (ABS) is a community of
naturalists cataloguing the biodiversity of southern Costa Rica. This survey
runs from La Amistad International Park and through biological corridors to the
Osa Peninsula. Take your observations beyond Osa and join the ABS today!

139804

Observations

8134

Species

3692

Observers

5690

Identifiers


TOP 50

MOST OBSERVATIONS

1

frankchaves6830 2

veroalpizar55433

katia3746024

marco46440385

heinerziegler22866

rob2120377

suyenlopez20198

gernotkunz19429

luanatura154610

apistopanchax133911

rp_r3126412

capepolly124113

marinachaves116614

yolanfa116515

hannahfloyd_naturalist114816

rp_r5108817

pb_c1105718

leo_alvalc102619

leiner95720

gringocurt84921

paul_norwood84022

osaconservation81623

jacksonfrost72224

arleth_rodriguez68025

sea-kangaroo66926

timo2759827

ticoswildstudio56328

siwanicki54729

steve_orridge52930

andyenlaselva52431

oridgen1051632

jo_de_pauw51433

lesmes51034

miguel195850535

loarie50336

gianfranco49737

birdernaturalist49338

opisska48639

mason_s48240

project_dusk47341

lucaboscain46642

loganw45043

threeagoutdoors44344

elliottsteele42945

henry18042246

maxponce41847

laura_palacin_fernandez41248

marvinlopez40749

dloarie40350

leshibug397

MOST SPECIES

1

frankchaves1104 2

heinerziegler9553

marco4648174

gernotkunz7845

katia377336

leo_alvalc6397

veroalpizar6108

gringocurt5579

yolanfa49010

hannahfloyd_naturalist48611

luanatura47912

rob2147213

capepolly45714

apistopanchax45015

paul_norwood40316

rp_r337117

leiner35718

marinachaves35619

lostincr28920

miguel195828021

ticoswildstudio27522

rp_r526323

laura_palacin_fernandez26324

pb_c125525

gianfranco25426

jacksonfrost25327

marvinlopez25228

nathaliatapia23929

jo_de_pauw23830

maxponce23531

andyenlaselva23432

birdernaturalist23333

sea-kangaroo23034

timo2722735

suyenlopez22036

loarie21637

dloarie21538

eduardo_chacon21339

lucaboscain20740

loganw20141

hholbrook19842

elliottsteele19643

mason_s19444

oridgen1019445

leshibug19346

henry18019247

golfodulceretreat19248

threeagoutdoors18749

tannp18350

lnolaker182

MOST OBSERVED SPECIES

1

Common Basilisk1139 2

Scarlet Macaw11103

Osa Anole8584

Central American Spider Monkey8175

Central American White-faced Capuchin7766

White-nosed Coati7617

Common Black Hawk6838

Yellow-throated Toucan6729

Baird's Tapir65310

Central American Squirrel Monkey64311

Scarlet-rumped Tanager61412

Giant Toad58213

Green Iguana57414

Bare-throated Tiger-Heron56615

Mantled Howler Monkey51916

Ecuadorian Hermit Crab51917

Northern Black-throated Trogon51818

Northern Tamandua47819

Yellow-headed Caracara46520

Golden Silk Spider45721

Black Vulture45022

Rosenberg's Gladiator Frog45023

Terciopelo44324

Roadside Hawk44325

Great Curassow42926

American Crocodile41327

Red-eyed Tree Frog39928

White Ibis39229

Savage's Thin-toed Frog38530

Banded Peacock33631

Red-lored Parrot33232

Fitzinger's Robber Frog33133

Brown-throated Three-toed Sloth30534

Green-and-black Poison Dart Frog30435

Brown Pelican29936

Tropical Kingbird29837

Collared Peccary28538

Four-lined Whiptail28239

Ornate Cat-eyed Snake28140

Stejneger's Robber Frog27441

Spotted Sandpiper27342

Border Anole27343

Black Spiny-tailed Iguana26844

Crested Caracara26645

Magnificent Frigatebird24946

Fiery-billed Aracari24147

Masked Tree Frog24048

Black-hooded Antshrike23749

Slaty-tailed Trogon23650

Golfo Dulce Poison Dart Frog235




FILTER BY


Location

Species

The Osa Peninsula encompasses a variety of terrestrial and marine ecosystems.
Filter by protected area on the map below to see the most observed species for
each location.

.Corcovado
        National Park
.Piedras Blancas
        National Park
.Golfo Dulce
.Golfo Dulce
        Forest Reserve
.Caño Island
        Biological
        Reserve
.Térraba Sierpe
        National
        Wetland
+−

10 km
5 mi
Leaflet | iNaturalist API


Corcovado National Park
View >

×

+−

5 km
3 mi
Leaflet | iNaturalist API
Piedras Blancas National Park
View >

×

+−

3 km
2 mi
Leaflet | iNaturalist API
Golfo Dulce
View >

×

+−

5 km
3 mi
Leaflet | iNaturalist API
Golfo Dulce Forest Reserve
View >

×

+−

10 km
5 mi
Leaflet | iNaturalist API
Caño Island Biological Reserve
View >

×

+−

1 km
1 mi
Leaflet | iNaturalist API
Térraba Sierpe National Wetland
View >

×

+−

1 km
1 mi
Leaflet | iNaturalist API


OBS RECENT OBSERVATIONS

Previous


SHIMMERING GOLDEN SUGAR ANT

(Camponotus sericeiventris)

Golfito, Puntarenas, CR

gverci


SPIDERS

(Araneae)

Golfito, Puntarenas, CR

gverci


COMMON GILLED MUSHROOMS AND ALLIES

(Agaricales)

Golfito, Puntarenas, CR

gverci


BROWN DOG TICK

(Rhipicephalus sanguineus)

Calle Palo Seco, Golfito, Puntarenas, CR

leshibug


TETRIO SPHINX

(Pseudosphinx tetrio)

Corcovado National Park, Osa, Puntarenas, CR

exoticdvm4


---

(Euclystis)

Golfito, Puntarenas, CR

maggiegrady


BLACK SPINY-TAILED IGUANA

(Ctenosaura similis)

Golfito, Puntarenas, CR

maggiegrady


CENTRAL AMERICAN WHITE-FACED CAPUCHIN

(Cebus imitator)

Golfito, Puntarenas, CR

gverci


---

(Amplinus)

Golfito, Puntarenas, CR

gverci


---

(Cookeina speciosa)

Golfito, Puntarenas, CR

gverci


EXPANDED LOBSTERCLAW

(Heliconia latispatha)

Golfito, Puntarenas, CR

gverci


REISHI

(Ganoderma)

Golfito, Puntarenas, CR

gverci


ATTA LEAF-CUTTER ANTS

(Atta)

Golfito, Puntarenas, CR

gverci


SHIMMERING GOLDEN SUGAR ANT

(Camponotus sericeiventris)

Golfito, Puntarenas, CR

gverci


SPIDERS

(Araneae)

Golfito, Puntarenas, CR

gverci


COMMON GILLED MUSHROOMS AND ALLIES

(Agaricales)

Golfito, Puntarenas, CR

gverci


BROWN DOG TICK

(Rhipicephalus sanguineus)

Calle Palo Seco, Golfito, Puntarenas, CR

leshibug


TETRIO SPHINX

(Pseudosphinx tetrio)

Corcovado National Park, Osa, Puntarenas, CR

exoticdvm4


---

(Euclystis)

Golfito, Puntarenas, CR

maggiegrady


BLACK SPINY-TAILED IGUANA

(Ctenosaura similis)

Golfito, Puntarenas, CR

maggiegrady


CENTRAL AMERICAN WHITE-FACED CAPUCHIN

(Cebus imitator)

Golfito, Puntarenas, CR

gverci


---

(Amplinus)

Golfito, Puntarenas, CR

gverci


---

(Cookeina speciosa)

Golfito, Puntarenas, CR

gverci


EXPANDED LOBSTERCLAW

(Heliconia latispatha)

Golfito, Puntarenas, CR

gverci


REISHI

(Ganoderma)

Golfito, Puntarenas, CR

gverci


ATTA LEAF-CUTTER ANTS

(Atta)

Golfito, Puntarenas, CR

gverci


SHIMMERING GOLDEN SUGAR ANT

(Camponotus sericeiventris)

Golfito, Puntarenas, CR

gverci


SPIDERS

(Araneae)

Golfito, Puntarenas, CR

gverci


COMMON GILLED MUSHROOMS AND ALLIES

(Agaricales)

Golfito, Puntarenas, CR

gverci

Next

A shortlist of key conservation species to help assess marine and terrestrial
ecosystem health in the Osa Peninsula. View the key species we are monitoring
and find out who has the most observations.

Previous


MORA TREE

(Mora oleifera)


SPIDER MONKEY

(Ateles geoffroyi)


JAGUAR

(Panthera onca)


WHITE-LIPPED PECCARY

(Tayassu pecari)


PUMA

(Puma concolor)


BAIRD'S TAPIR

(Tapirus bairdii)


YELLOW-BILLED COTINGA

(Carpodectes antoniae)


MANGROVE HUMMINGBIRD

(Amazilia boucardi)


BLACK-CHEEKED ANT-TANAGER

(Habia atrimaxillaris)


SCARLET MACAW

(Ara macao)


GREAT CURASSOW

(Crax rubra)


YELLOW-BELLIED SEA SNAKE

(Hydrophis platurus)


BLUEBARRED PARROTFISH

(Scarus ghobban)


BOTTLENOSE DOLPHINS

(Tursiops truncatus)


HUMPBACK WHALE

(Megaptera novaeangliae)


HAWKSBILL SEA TURTLE

(Eretmochelys imbricata)


GOLFO DULCE POISON DART FROG

(Phyllobates vittatus)


RED-EYED TREE FROG

(Agalychnis callidryas)


BLACK-HEADED BUSHMASTER

(Lachesis melanocephala)


GREEN AND BLACK POISON DART FROG

(Dendrobates auratus)


EYELASH PIT VIPER

(Bothriechis schlegelii)


AJO TREE

(Caryocar costaricense)


PURPLEHEART

(Peltogyne purpurea)


MANU TREE

(Minguartia guianensis)


AJO NEGRO TREE

(Anthodiscus chocoensis)


MORA TREE

(Mora oleifera)


SPIDER MONKEY

(Ateles geoffroyi)


JAGUAR

(Panthera onca)


WHITE-LIPPED PECCARY

(Tayassu pecari)


PUMA

(Puma concolor)


BAIRD'S TAPIR

(Tapirus bairdii)


YELLOW-BILLED COTINGA

(Carpodectes antoniae)


MANGROVE HUMMINGBIRD

(Amazilia boucardi)


BLACK-CHEEKED ANT-TANAGER

(Habia atrimaxillaris)


SCARLET MACAW

(Ara macao)


GREAT CURASSOW

(Crax rubra)


YELLOW-BELLIED SEA SNAKE

(Hydrophis platurus)


BLUEBARRED PARROTFISH

(Scarus ghobban)


BOTTLENOSE DOLPHINS

(Tursiops truncatus)


HUMPBACK WHALE

(Megaptera novaeangliae)


HAWKSBILL SEA TURTLE

(Eretmochelys imbricata)


GOLFO DULCE POISON DART FROG

(Phyllobates vittatus)


RED-EYED TREE FROG

(Agalychnis callidryas)


BLACK-HEADED BUSHMASTER

(Lachesis melanocephala)


GREEN AND BLACK POISON DART FROG

(Dendrobates auratus)


EYELASH PIT VIPER

(Bothriechis schlegelii)


AJO TREE

(Caryocar costaricense)


PURPLEHEART

(Peltogyne purpurea)


MANU TREE

(Minguartia guianensis)


AJO NEGRO TREE

(Anthodiscus chocoensis)


MORA TREE

(Mora oleifera)

Next

MOST OBSERVATIONS




EVENTS


OSA PENINSULA 2 WEEK BIOBLITZ FEB 2019

The annual Osa Peninsula Bioblitz was established in 2019. To kick off these
efforts the Osa Biodiversity Survey went out as much as possible during 2 weeks
in Feb to catalogue all the biodiversity they could find.

3621

Observations

1009

Species

68

Observers

772

Identifiers


GROUPS


GUÍA INA

guide training project

48

Observations

29

Species

5

Observers

41

Identifiers


OSA CONSERVATION

Whether you are a volunteer, a research field assistant, staff or conservation
visitor you can join the battle.... who will be the iNat King or Queen
@osaconservation.

8412

Observations

2264

Species

29

Observers

1373

Identifiers


GRUPO DE MONITOREO RANCHO QUEMADO

Este grupo recopila observaciones del Grupo de Monitoreo de Rancho Quemado,
Península de Osa, Costa Rica.

319

Observations

201

Species

4

Observers

256

Identifiers

Follow us


www.osaconservation.org



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