biology

IUCN Red List critically endangered species (Animalia)

IUCN Red List critically endangered species (Animalia) is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand IUCN Red List critically endangered species (Animalia) rather than just read about it. In short: As of 19 August 2018, the IUCN Red List of Threatened Species has identified 3,005 critically endangered species, subspecies, stocks and subpopulations in the Animalia kingdom. Annelida Clitellata Megadrilaceae Lumbricidae Megascolecidae Opisthopora Acanthodrilidae Octochaetidae Polychaeta Nerillida Nerillidae Arthropoda Arachnida Araneae Barychelidae Corinnidae Ctenidae Ctenizidae Gnaphosidae Linyphiidae Liphistiid…

Key takeaways

IUCN Red List critically endangered species (Animalia) belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IUCN Red List critically endangered species (Animalia) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IUCN Red List critically endangered species (Animalia) from memory before moving on to harder problems.

Reference excerpt

As of 19 August 2018, the IUCN Red List of Threatened Species has identified 3,005 critically endangered species, subspecies, stocks and subpopulations in the Animalia kingdom.

Annelida

Clitellata

Megadrilaceae

Lumbricidae

Megascolecidae

Opisthopora

Acanthodrilidae

Octochaetidae

Polychaeta

Nerillida

Nerillidae

Arthropoda

Arachnida

Araneae

Barychelidae

Corinnidae

Ctenidae

Ctenizidae

Gnaphosidae

Linyphiidae

Liphistiidae

Lycosidae

Miturgidae (Includes former Zoridae.)

Ochyroceratidae

Oonopidae

Palpimanidae

Pholcidae

Salticidae

Segestriidae

Symphytognathidae

Telemidae

Theraphosidae

Theridiidae

Theridiosomatidae

Holothyrida

Holothyridae

Opiliones

Biantidae

Podoctidae

Samoidae

Pseudoscorpiones

Geogarypidae

Schizomida

Hubbardiidae

Scorpiones

Buthidae

Branchiopoda

Anostraca

Branchinectidae

Streptocephalidae

Thamnocephalidae

Chilopoda

Geophilomorpha

Ballophilidae

Mecistocephalidae

Diplopoda

Polydesmida

Paradoxosomatidae

Polyzoniida

Siphonotidae

Sphaerotheriida

Arthrosphaeridae

Spirobolida

Pachybolidae

Spirobolellidae

Spirostreptida

Spirostreptidae

Stemmiulida

Stemmiulidae

Entognatha

Collembola

Hypogastruridae

Tullbergiidae

Insecta

Blattodea

Blattellidae

Polyphagidae

Coleoptera

Anthribidae

Carabidae

Cerambycidae

Chrysomelidae

Cicindelidae

Curculionidae

Dytiscidae

Elateridae

Geotrupidae

Laemophloeidae

Leiodidae

Lucanidae

Ptinidae

Rhadalidae

Scarabaeidae

Silphidae

Staphylinidae

Tenebrionidae

Zopheridae

Dermaptera

Carcinophoridae

Labiidae

Grylloblattodea

Grylloblattidae

Hemiptera

Cixiidae

Pseudococcidae

Psyllidae

Triozidae

Hymenoptera

Andrenidae

Apidae

Formicidae

Megachilidae

Isoptera

Kalotermitidae

Lepidoptera

Geometridae

Lycaenidae

Noctuidae

Nymphalidae

Papilionidae

Pieridae

Pterophoridae

Pyralidae

Sphingidae

Stathmopodidae

Tineidae

Mantodea

Mantidae

Odonata

Argiolestidae

Calopterygidae

Chlorocyphidae

Chlorogomphidae

Coenagrionidae

Cordulegastridae

Euphaeidae

Gomphidae

Heteragrionidae

Lestidae

Libellulidae

Macromiidae

Megapodagrionidae

Not Assigned

Pentaphlebiidae

Perilestidae

Platycnemididae

Platystictidae

Orthoptera

Acrididae

Dericorythidae

Euschmidtiidae

Gryllidae

Lentulidae

Mogoplistidae

Pamphagidae

Pyrgacrididae

Pyrgomorphidae

Rhaphidophoridae

Tetrigidae

Tettigoniidae

Thericleidae

Trigonidiidae

Phasmatodea

Diapheromeridae

Lonchodidae

Phasmatidae

Phthiraptera

Haematopinidae

Plecoptera

Gripopterygidae

Malacostraca

Amphipoda

Bogidiellidae

Gammaridae

Hadziidae

Ingolfiellidae

Liljeborgiidae

Paramelitidae

Phoxocephalidae

Decapoda

Astacidae

Atyidae

Cambaridae

Gecarcinucidae

Hippolytidae

Palaemonidae

Parastacidae

Potamidae

Potamonautidae

Procarididae

Pseudothelphusidae

Sesarmidae

Isopoda

Anthuridae

Armadillidae

Atlantasellidae

Cirolanidae

Sphaeromatidae

Mictacea

Mictocarididae

Mysida

Mysidae

Maxillopoda

Calanoida

Epacteriscidae

Pseudocyclopiidae

Cyclopoida

Speleoithonidae

Misophrioida

Misophriidae

Platycopioida

Platycopiidae

Ostracoda

Halocyprida

Halocyprididae

Podocopida

Cyprididae

Chordata

Actinopterygii

Acipenseriformes

Acipenseridae

Polyodontidae Psephurus gladius

Anguilliformes

Anguillidae

Atheriniformes

Atherinidae

Atherinopsidae

Bedotiidae

Melanotaeniidae

Pseudomugilidae

Beloniformes

Adrianichthyidae

Characiformes

Alestidae

Characidae

Distichodontidae

Lebiasinidae

Clupeiformes

Clupeidae

Cypriniformes

Balitoridae

Catostomidae

Cobitidae

Cyprinidae

Psilorhynchidae

Cyprinodontiformes

Cyprinodontidae

Fundulidae

Goodeidae

Nothobranchiidae

Poeciliidae

Rivulidae

Valenciidae

Gadiformes

Macrouridae

Gasterosteiformes

Gasterosteidae

Lophiiformes

Brachionichthyidae

Ophidiiformes

Bythitidae

Osmeriformes

Galaxiidae

Osmeridae

Perciformes

Blenniidae

Callionymidae

Cichlidae

Datnioididae

Elassomatidae

Eleotridae

Epinephelidae

Gobiidae

Labrisomidae

Osphronemidae

Percichthyidae

Percidae

Polyprionidae

Pomacentridae

Sciaenidae

Scombridae

Sparidae

Percopsiformes

Amblyopsidae

Salmoniformes

Salmonidae

Scorpaeniformes

Cottidae

Sebastidae

Siluriformes

Ariidae

Astroblepidae

Bagridae

Clariidae

Heptapteridae

Ictaluridae

Loricariidae

Mochokidae

Pangasiidae

Pimelodidae

Siluridae

Sisoridae

Trichomycteridae

Syngnathiformes

Syngnathidae

Tetraodontiformes

Tetraodontidae

Amphibia

Anura

Alsodidae

Alytidae

Aromobatidae

Arthroleptidae

Brevicipitidae

Bufonidae

Centrolenidae

Ceratobatrachidae

Conrauidae

Craugastoridae

Cycloramphidae

Dendrobatidae

Dicroglossidae

Eleutherodactylidae

Heleophrynidae

Hemiphractidae

Hylidae

Hyperoliidae

Leiopelmatidae

Leptodactylidae

Limnodynastidae

Mantellidae

Megophryidae

Micrixalidae

Microhylidae

Myobatrachidae

Nyctibatrachidae

Odontophrynidae

Petropedetidae

Phrynobatrachidae

Pipidae

Pyxicephalidae

Ranidae

Ranixalidae

Rhacophoridae

Sooglossidae

Telmatobiidae

Caudata

Ambystomatidae

Cryptobranchidae

Hynobiidae

Plethodontidae

Salamandridae

Gymnophiona

Scolecomorphidae

Aves

Accipitriformes

Accipitridae

Anseriformes

Anatidae

Apodiformes

Trochilidae

Bucerotiformes

Bucerotidae

Caprimulgiformes

Aegothelidae

Caprimulgidae

Cathartiformes

Cathartidae

Charadriiformes

Charadriidae

Glareolidae

Laridae

Pedionomidae

Recurvirostridae

Scolopacidae

Turnicidae

Columbiformes

Columbidae

Coraciiformes

Alcedinidae

Cuculiformes

Cuculidae

Galliformes

Cracidae

Phasianidae

Gruiformes

Gruidae

Psophiidae

Rallidae

Otidiformes

Otididae

Passeriformes

Acrocephalidae

Alaudidae

Callaeidae

Campephagidae

Cisticolidae

Corvidae

Cotingidae

Dicaeidae

Emberizidae

Fringillidae

Furnariidae

Grallariidae

Hirundinidae

Icteridae

Laniidae

Leiothrichidae

Macrosphenidae

Meliphagidae

Mimidae

Monarchidae

Muscicapidae

Oriolidae

Pachycephalidae

Parulidae

Passerellidae

Pipridae

Pycnonotidae

Rhinocryptidae

Sturnidae

Thamnophilidae

Thraupidae

Troglodytidae

Turdidae

Tyrannidae

Zosteropidae

Pelecaniformes

Ardeidae

Threskiornithidae

Piciformes

Picidae

Podicipediformes

Podicipedidae

Procellariiformes

Diomedeidae

Hydrobatidae

Oceanitidae

Procellariidae

Psittaciformes

Cacatuidae

Psittacidae

Strigopidae

Strigiformes

Strigidae

Suliformes

Fregatidae

Phalacrocoracidae

Cephalaspidomorphi

Petromyzontiformes

Petromyzontidae

Chondrichthyes

Carcharhiniformes

Carcharhinidae

Scyliorhinidae

Triakidae

Lamniformes

Lamnidae

Odontaspididae

Myliobatiformes

Dasyatidae

Rajiformes

Narkidae

Rajidae

Torpedinidae

Urolophidae

Rhinopristiformes

Pristidae

Rhinobatidae

Squaliformes

Squalidae

Squatiniformes

Squatinidae

Mammalia

Afrosoricida

Chrysochloridae

Carnivora

Canidae

Felidae

Mustelidae

Procyonidae

Viverridae

Cetartiodactyla

Balaenidae

Balaenopteridae

Bovidae

Camelidae

Cervidae

Delphinidae

Eschrichtiidae

Lipotidae

Monodontidae

Phocoenidae

Suidae

Chiroptera

Emballonuridae

Hipposideridae

Megadermatidae

Mystacinidae

Natalidae

Phyllostomidae

Pteropodidae

Rhinolophidae

Vespertilionidae

Dasyuromorphia

Dasyuridae

Didelphimorphia

Didelphidae

Diprotodontia

Burramyidae

Macropodidae

Petauridae

Phalangeridae

Potoroidae

Pseudocheiridae

Vombatidae

Eulipotyphla

Soricidae

Lagomorpha

Leporidae

Monotremata

Tachyglossidae

Perissodactyla

Equidae

Rhinocerotidae

Pholidota

Manidae

Pilosa

Bradypodidae

Primates

Atelidae

Callitrichidae

Cebidae

Cercopithecidae

Cheirogaleidae

Galagidae

Hominidae

Hylobatidae

Indriidae

Lemuridae

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with IUCN Red List critically endangered species (Animalia)

Start with the simplest possible case. Write down what IUCN Red List critically endangered species (Animalia) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to IUCN Red List critically endangered species (Animalia) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about IUCN Red List critically endangered species (Animalia) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of IUCN Red List critically endangered species (Animalia)

In research: IUCN Red List critically endangered species (Animalia) appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses IUCN Red List critically endangered species (Animalia) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: IUCN Red List critically endangered species (Animalia) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Critically endangered animals, IUCN Red List critically endangered species, so understanding it makes those chapters shorter.
In everyday life: Look for IUCN Red List critically endangered species (Animalia) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study IUCN Red List critically endangered species (Animalia) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IUCN Red List critically endangered species (Animalia) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain IUCN Red List critically endangered species (Animalia) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IUCN Red List critically endangered species (Animalia) in simple terms?

As of 19 August 2018, the IUCN Red List of Threatened Species has identified 3,005 critically endangered species, subspecies, stocks and subpopulations in the Animalia kingdom. Annelida Clitellata Megadrilaceae Lumbricidae Megascolecidae Opisthopora Acanthodrilidae Octochaetidae Polychaeta Nerillid…

Why does IUCN Red List critically endangered species (Animalia) matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study IUCN Red List critically endangered species (Animalia)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on IUCN Red List critically endangered species (Animalia).