Species Explorer

Browse and search species from the IUCN Red List and GBIF.

54,666 species

Olivbrauner Rötling

EN

Entoloma versatile

Pop: Not assessed|Trend:

olivbrun kremla

VU

Russula olivobrunnea

Pop: Not assessed|Trend:

Olive Bog-moss

VU

Sphagnum majus

Pop: Not assessed|Trend:

Olive Grouper

VU

Epinephelus cifuentesi

Pop: Not assessed|Trend:

Olive Skipper

VU

Pyrgus serratulae

Pop: Not assessed|Trend:

olivinkremla

VU

Russula olivina

Pop: Not assessed|Trend:

olkiputkisirvikäs

VU

Limnephilus fuscinervis

Pop: Not assessed|Trend:

Olrog's Gull

EN

Larus atlanticus

Pop: Not assessed|Trend:

Olympic Torrent Salamander

VU

Rhyacotriton olympicus

Pop: Not assessed|Trend:

Omao

VU

Myadestes obscurus

Pop: Not assessed|Trend:

Onderbroken-bandzweefvlieg

VU

Syrphus nitidifrons

Pop: Not assessed|Trend:

One-grooved Diving Beetle

VU

Bidessus unistriatus

Pop: Not assessed|Trend:

One-toothed silvan flat bark beetle

VU

Silvanus unidentatus

Pop: Not assessed|Trend:

Onthophage ovatus

VU

Onthophagus ovatus

Pop: Not assessed|Trend:

Onthophage vacca

EN

Onthophagus vacca

Pop: Not assessed|Trend:

oostelijke grashalmdansvlieg

EN

Hybos grossipes

Pop: Not assessed|Trend:

oostelijke sapzweefvlieg

EN

Brachyopa pilosa

Pop: Not assessed|Trend:

oosterse langlijf

VU

Sphaerophoria chongjini

Pop: Not assessed|Trend:

Opposite-leaved Pondweed

EN

Groenlandia densa

Pop: Not assessed|Trend:

Orange Birch Bolete

VU

Leccinum versipelle

Pop: Not assessed|Trend:

Orange Coral

VU

Ramariopsis crocea

Pop: Not assessed|Trend:

Orange Tooth

EN

Hydnellum aurantiacum

Pop: Not assessed|Trend:

Orange-blotch Cosmet

EN

Chrysoclista lathamella

Pop: Not assessed|Trend:

Orange-breasted Falcon

EN

Falco deiroleucus

Pop: Not assessed|Trend:

Orange-fronted Barbet

VU

Capito squamatus

Pop: Not assessed|Trend:

Orange-fruited Elm-lichen

CR

Cerothallia luteoalba

Pop: Not assessed|Trend:

Orange-fruited Elm-lichen faces severe threats from air pollution and habitat degradation, which compromise the specific atmospheric conditions required for this sensitive epiphytic species. Urban expansion and industrial emissions have significantly reduced suitable habitat, while climate change alters precipitation patterns and temperature regimes critical for lichen survival.

orange-tipped grasshopper

EN

Omocestus haemorrhoidalis

Pop: Not assessed|Trend:

orangebandad kamnuding

VU

Trinchesia foliata

Pop: Not assessed|Trend:

Orchard Toothcrust

CR

Sarcodontia setosa

Pop: Not assessed|Trend:

The Orchard Toothcrust faces severe threats from habitat loss due to the decline of traditional orchards and old-growth forests containing its essential host trees. Climate change and intensive agricultural practices have dramatically reduced suitable substrates, while pollution and pesticide use in modern farming further compromise the fungal communities this species depends on for survival.

Orchid

EN

Vanda tricolor

Pop: Not assessed|Trend:

Orchis de Spitzel

VU

Orchis spitzelii

Pop: Not assessed|Trend:

Oregon Slender Salamander

VU

Batrachoseps wrighti

Pop: Not assessed|Trend:

orejas de burro

VU

Espeletia grandiflora

Pop: Not assessed|Trend:

oresinoberlav

EN

Ramboldia subcinnabarina

Pop: Not assessed|Trend:

Øresunds-hønsetarm

EN

Cerastium subtetrandrum

Pop: Not assessed|Trend:

Oriental Meadow Brown

CR

Hyponephele lupinus

Pop: Not assessed|Trend:

The Oriental Meadow Brown faces severe population declines due to widespread habitat loss from agricultural intensification and urban development across its range. Climate change is altering the grassland ecosystems this species depends on, while overgrazing by livestock degrades the quality of remaining meadow habitats essential for breeding and larval development.

Orkney Notchwort

VU

Anastrepta orcadensis

Pop: Not assessed|Trend:

Ortholite rétrécie (L')

EN

Scotopteryx coarctaria

Pop: Not assessed|Trend:

Orthotric de Roger

VU

Orthotrichum rogeri

Pop: Not assessed|Trend:

Ortolan Bunting

CR

Emberiza hortulana

Pop: Not assessed|Trend:

The Ortolan Bunting faces severe population declines across its range due to intensive agricultural practices that have eliminated traditional farming landscapes and reduced insect prey availability. Illegal hunting and trapping for culinary purposes, particularly in Mediterranean countries, continues to impact populations despite legal protections. Climate change is altering breeding and wintering habitats, while habitat fragmentation has isolated remaining populations.

oskarshamnsfibbla

VU

Hieracium prolatescens

Pop: Not assessed|Trend:

oslosprekklav

VU

Acarospora impressula

Pop: Not assessed|Trend:

Ostrich-plume Moss

CR

Ptilium crista-castrensis

Pop: Not assessed|Trend:

Ostrich-plume Moss faces severe threats from habitat destruction due to deforestation, logging, and land conversion in its specialized boreal and montane forest ecosystems. Climate change poses an additional critical threat by altering temperature and moisture regimes essential for this species' survival, while air pollution and acid deposition further degrade the delicate conditions required for moss growth and reproduction.

Ou

CR

Psittirostra psittacea

Pop: Not assessed|Trend:

The Ou faces severe threats from habitat destruction due to deforestation and agricultural conversion of native Hawaiian forests. Introduced diseases, particularly avian malaria and pox transmitted by non-native mosquitoes, have devastated populations, while competition from invasive bird species and habitat degradation from feral ungulates further threaten this endemic Hawaiian honeycreeper.

Oval-leaved Pottia

VU

Pterygoneurum ovatum

Pop: Not assessed|Trend:

ovate tetrodontium moss

VU

Tetrodontium ovatum

Pop: Not assessed|Trend:

Overleaf Pellia

VU

Pellia epiphylla

Pop: Not assessed|Trend:

Oviary

CR

Aspidostemon trianthera

Pop: Not assessed|Trend:

Aspidostemon trianthera faces severe population declines due to extensive habitat destruction from agricultural expansion and urban development across its limited range. The species' highly specialized habitat requirements and small, fragmented populations make it extremely vulnerable to environmental changes and human disturbance.

Owl Parrot

CR

Strigops habroptila

Pop: Not assessed|Trend:

The Owl Parrot faces severe threats from introduced mammalian predators, particularly stoats, cats, and rats, which prey on eggs, chicks, and adults of this flightless species. Habitat destruction from deforestation and human development has drastically reduced available nesting and foraging areas. The species' extremely slow reproductive rate, with females breeding only every 2-4 years when rimu fruit is abundant, makes population recovery exceptionally difficult.

Oxbow Diving Beetle

CR

Hydroporus rufifrons

Pop: Not assessed|Trend:

The Oxbow Diving Beetle faces severe threats from habitat destruction and degradation of its specialized aquatic environments. Pollution from agricultural runoff and urban development, combined with climate change impacts on water levels and quality, have drastically reduced suitable habitat availability. The species' restricted range and specific habitat requirements make it particularly vulnerable to these ongoing pressures.

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