Tim Laman / Mouse (Mus ? Apodemus ?). New, unidentified species found at 1650 m in the Foja Mountains. Papua, Indonesia, 2008. (taken during Conservation International Rapid Assessment Program expedition)

Pete Oxford / Feather mimic caterpillar found in Macipucuna Cloudforest Andes, Ecuador, South America. Unidentified species

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis) unidentified unflanged adult male, Batang Toru Forest, Sumatran Orangutan Conservation Project North Sumatran Province, Indonesia.

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis) unidentified unflanged adult male, Batang Toru Forest, Sumatran Orangutan Conservation Project North Sumatran Province, Indonesia.

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis) unidentified unflanged adult male, Batang Toru Forest, Sumatran Orangutan Conservation Project North Sumatran Province, Indonesia.

Constantinos Petrinos / Decorator crab (unidentified) on Soft Coral at night. Due to the heavy decoration, the diagnostic features of many species are hidden from view and only a laboratory examination of a specimen can prov...

Constantinos Petrinos / Decorator crab (unidentified) on Soft Coral at night. Due to the heavy decoration, the diagnostic features of many species are hidden from view and only a laboratory examination of a specimen can prov...

Constantinos Petrinos / Decorator crab (unidentified) on Soft Coral at night. Due to the heavy decoration, the diagnostic features of many species are hidden from view and only a laboratory examination of a specimen can prov...

Alex Hyde / Fungal mycelium from an unidentified species of fungus, growing across a decomposing leaf. The mycelium is the vegetative part of the fungus and is made up of a mass of thread-like hyphae. Osa Peninsu...

Kim Taylor / Stinging caterpillar (Lepidoptera, unidentified species) Tobago, West Indies.

Chien Lee / Cicada (Cicadoidea), Malaysia

Chien Lee / Mantis (Mantodea), Danum Valley Field Centre, Borneo, Malaysia

Chien Lee / Leafhopper (Cicadellidae), Danum Valley Field Centre, Borneo, Malaysia

Chien Lee / Katydid (Tettigoniidae)mimicking leaf, Danum Valley Field Centre, Borneo, Malaysia

Chien Lee / Katydid (Tettigoniidae), Mount Kinabalu National Park, Borneo, Malaysia

John Cancalosi / Slime mold, unidentified species of Mycetozoa, New york, USA, July.

Alex Hyde / Fungal mycelium from an unidentified species of fungus, revealed underneath the bark of a rotting tree branch. Peak Disrtict National Park, Derbyshire, UK, October.

Wild Wonders of Europe / Lundgren / Unidentified swimming freshwater snail species, Danube Delta, Romania, June.

Michele Westmorland / Ctenophores comb jelly (species unidentified) Galapagos Islands.

Michele Westmorland / Spined sea star, species unidentified. Galapagos Islands.

D. Parer & E. Parer-Cook / Leech, sucking blood from hand, Australia

Franco Banfi / Close up detail of hard coral, unidentified species, Maldives, Indian Ocean

Mike Potts / Water Lily, unidentified species, Kakadu National Park, Northern Territory, Australia, July

Jabruson / 'Boda' fungi growing on forest floor, the Ba'Aka name for a non-edible, unidentified species of fungi found throughout the forest just after the start of the rainy season. Bai Hokou, Dzanga-Ndoki Nati...

Jabruson / Bracket fungus growing on old dead tree trunk, an unidentified species, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Tim Laman / Mouse (Mus ? Apodemus ?). New, unidentified species found at 1650 m in the Foja Mountains. Papua, Indonesia, 2008. (taken during Conservation International Rapid Assessment Program expedition)

Tim Laman / Parakeet. Unidentified, possible a new species (Myiopsitta sp.). Captured in the Foja Mountains at 1650 m. Foja Mountains, Papua, Indonesia, 2008. (taken during Conservation International Rapid Assess...

Laurent Geslin / Unidentified moth species, on tree branch, Chobe National Park, northwest Botswana, Southern Africa

Michael Hutchinson / Mass of Butterfly cocoons (unidentified species) attached to tree trunk, some empty, some with pupae, Iguazu NP, Argentina

Michael Hutchinson / Mass of Butterfly cocoons (unidentified species) attached to tree trunk, some empty, some with pupae, Iguazu NP, Argentina

GEORGETTE DOUWMA / Shoal of pygmy sweepers (Parapriacanthus ransonetti) in foreground with unidentified Sweepers (Parapriacanthus sp.) in background. Andaman Sea, Thailand

GEORGETTE DOUWMA / Shoal of pygmy sweepers (Parapriacanthus ransonetti) in foreground with unidentified Sweepers (Parapriacanthus sp.) in background. Andaman Sea, Thailand

Albert Lleal / SEM close-up view of a Intertidal Crustacean at 21x magnification, an unidentified species, found on Kihim Beach, Mumbai, India

Albert Lleal / SEM close-up view of a Intertidal Crustacean at 70x magnification, an unidentified species, found on Kihim Beach, Mumbai, India

Albert Lleal / Butterfly wing detail, unidentified species

Chris Newbert / Octopus (Octopus sp) in a bottle, this species is unidentified, but it is believed to be poisonous, 60 feet deep

Chris Newbert / Octopus (Octopus sp) in a bottle, this species is unidentified, but is believed to be poisonous, 60 feet deep

Chris Newbert / Octopus (Octopus sp) in a bottle, this species is unidentified, but is believed to be poisonous, 60 feet deep

Chris Newbert / Octopus (Octopus sp) in a bottle, this species is unidentified, but is believed to be poisonous, 60 feet deep

Piotr Naskrecki / Rapid Assessment Katydid (Brachyamytta rapidoaestima), a newly discovered species, Mt Pic Du Fon, Guinea

Piotr Naskrecki / Newly discovered but as yet unnamed species of Katydid, Simandou Range, Guinea

Piotr Naskrecki / Katydid on fern in rainforest, newly discovered and unnamed species, Braulio Carrillo National Park, Costa Rica

Piotr Naskrecki / Aquatic Cockroach (Blattaria sp) newly discovered unnamed species, with Damselfly nymph in stream, Braulio Carrillo National Park, Costa Rica

Piotr Naskrecki / Newly discovered but as yet unnamed species of Katydid, Costa Rica

Piotr Naskrecki / Newly discovered but as yet unnamed species of Katydid, Kuranda, Australia

Piotr Naskrecki / Oz Katydid (Ozphyllum kuranda), a newly discovered species, Australia

Piotr Naskrecki / Spider of unknown species living under bark of an Elephant damaged Baobab tree, Botswana

Piotr Naskrecki / Spider of unknown species living under bark of an Elephant damaged Baobab tree, Botswana

Piotr Naskrecki / True Bug pair living under loosened bark of an Elephant damaged Baobab tree, Botswana

Piotr Naskrecki / Moreau's Tropical House Gecko (Hemidactylus mabouia) found living under bark of Elephant damaged Baobab, Botswana

Piotr Naskrecki / An unidentified Grasshopper clinging to stem, Botswana

Piotr Naskrecki / African Mantid (Sphodromantis sp), Guinea

Piotr Naskrecki / Stable Fly (Muscidae), Guinea

Piotr Naskrecki / Praying Mantis (Mantis sp) with Robber Fly, Dominican Republic

Piotr Naskrecki / Unidentified Mantid on fern, Guinea, West Africa

Piotr Naskrecki / Unidentified pupa, Costa Rica

Piotr Naskrecki / Moth (Yponomentidae) pupa, Costa Rica

Piotr Naskrecki / Species Unknown, Costa Rica

Piotr Naskrecki / Unidentified Cockroach on right, eating old cuticle on left after molting, recovering protein and carbohydrates shed during molting, Costa Rica

Piotr Naskrecki / Katydid (Ischyra sp) flying, newly discovered, yet unnamed, Costa Rica

Piotr Naskrecki / Longhorn Beetle (Cerambycidae) on leaf, Guinea, West Africa

Piotr Naskrecki / Unidentified metallic Fly, close-up on leaf, Dominican Republic

Piotr Naskrecki / Longhorn Beetle (Cerambycidae) portrait on mossy log, Madagascar

Piotr Naskrecki / Unidentified grass-mimicking Praying Mantis, eating a Fly, Guinea, West Africa

Piotr Naskrecki / Mantid (Mantoida sp), Costa Rica

Piotr Naskrecki / Newly discovered, yet unnamed Katydid, Costa Rica

Piotr Naskrecki / Newly discovered, yet unnamed Katydid mimicking a leaf on young fern, Costa Rica

Gertrud & Helmut Denzau / Close-up of unidentified Lizard species on ground showing good camouflage, Ladakh, North East India

Daniel Gomez / Unidentified flower living near waterfall of Pancada Grande, Brazil.

Daniel Gomez / Unidentified ant species on Rattan palm, Ulu Temburong NP. Brunei, Borneo

Kim Taylor / Dragonflies resting on grass (unidentified) Gambia, Africa. Digital composite.

Michael Durham / Sea Nettle (Chrysaora quinquecirrha) with unidentified parasitic Crab, common species in Caribbean, US Atlantic Ocean and Gulf of Mexico

Gerry Ellis / Yellow-banded Millipede (Narceus gordanus), cloud forest, Costa Rica

Chris Newbert / Jellyfish exhibiting bioluminescence, Hawaii

Chris Newbert / Jellyfish, exhibiting bioluminescence, Hawaii

Chris Newbert / Jellyfish, Hawaii

Chris Newbert / Larval Flounder of unknown species is translucent when young, Hawaii

Gertrud & Helmut Denzau / Unidentified Lizard species on rock, Ladakh, North East India

Constantinos Petrinos / Unidentified species of Moray eel {Anguilliformes} Sulawesi Indonesia. Indo Pacific

Cyril Ruoso / Black-crowned Night Heron (Nycticorax nycticorax) eating a bird chick of an unidentified species, Singapore

Roberto Rinaldi / Tube anemone, unidentified species, north Sabah, Borneo, Malaysia.

Piotr Naskrecki / Unidentified caterpillar with false eyes on knobs at its rear end, Australia

David Hall / RF - Group of Feather stars (Crinoidea) resting on an unidentified coral sea fan, Raja Ampat, Indonesia, Pacific Ocean. (This image may be licensed either as rights managed or royalty free.)

Doug Perrine / Hawaiian long-armed sand octopus (Thaumoctopus, Abdopus, or Macrotritopus sp.) unidentified species possibly endemic to Hawaii, swimming by jet propulsion, jetting water through its funnel, Honokohau,...

Doug Perrine / Hawaiian long-armed sand octopus (Thaumoctopus, Abdopus, or Macrotritopus sp.) unidentified species possibly endemic to Hawaii, pair displaying mating behaviour, dark maroon colour pattern around eyes...

Doug Perrine / Hawaiian long-armed sand octopus (Thaumoctopus, Abdopus, or Macrotritopus sp.) unidentified species possibly endemic to Hawaii, perched above its burrow with eyes raised for viewing its surroundings,...

Doug Perrine / Hawaiian long-armed sand octopus (Thaumoctopus, Abdopus, or Macrotritopus sp.) unidentified species possibly endemic to Hawaii, perched on tips of arms, Honokohau, North Kona, Big Island, Hawaii, Paci...

Ross Hoddinott / Fungi, unidentified species, among autumnal colour, Bolderwood, New Forest National Park, Hampshire, UK. November.

Roman Willi / Moth (Lepidoptera) unidentified species, nectaring on flower, Lucerne, Switzerland. August.

Georgette Douwma / Various starfishes (Asteroidea) composite image showing diveristy of shapes and colours on black background. Top row from left: Granulated starfish (Choriaster granulatus), Mosaic cushion star (Ha...

David Hall / Yellowline arrow crab (Stenorhynchus seticornis) feeding on an unidentified segmented worm, probably a polychaete tube worm (Sabellidae), Dominica, Caribbean, Western Atlantic Ocean.

Alex Mustard / Myzostomid crinoid worm (unidentified to species level) living camouflaged on a crinoid. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Alex Hyde / Fungal mycelia from an unidentified species of fungus, growing across a dead beach leaf. The mycelium is the vegetative part of the fungus and is made up of a mass of thread-like hyphae. Peak Disrtict...

Sirachai Arunrugstichai / Freshwater crab species (unidentified), burrows into the substrate in the root system of a tree at Tha Pom Khlong Song Nam, Krabi Province, Thailand

David Hall / A Giant rock scallop (Crassadoma gigantea) encrusted with and surrounded by several other invertebrates, including White anemones (Metridium sp.), White mushroom ascidians (Distaplia sp.), Red soft co...

David Hall / Gooseneck barnacles (Pollicipes polymerus) found only at Nakwakto Rapids, which has one of the strongest tidal currents in the world. Also seen are Vancouver featherduster worms (Eudistylia vancouveri...