• Lists of IUCN Red List critically endangered species

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• IUCN Red List critically endangered species (Animalia)

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• List of critically endangered amphibians


• List of critically endangered arthropods


• List of critically endangered birds


• List of critically endangered fishes


• List of critically endangered insects


• List of critically endangered invertebrates


• List of critically endangered mammals


• List of critically endangered molluscs


• List of critically endangered plants


• List of critically endangered reptiles

A

• Aaadonta angaurana


• Aaadonta constricta babelthuapi


• Aaadonta constricta constricta


• Aaadonta constricta komakanensis


• Aaadonta fuscozonata depressa


• Aaadonta fuscozonata fuscozonata


• Aaadonta irregularis


• Aaadonta kinlochi


• Aaadonta pelewana


• Abe's salamander


• Abies beshanzuensis


• Abies nebrodensis


• Abies numidica


• Abies yuanbaoshanensis


• Abrau sprat


• Abronia campbelli


• Abutilon eremitopetalum


• Abutilon menziesii


• Abutilon sandwicense


• Acalypha ecuadorica


• Acalypha eggersii


• Acalypha raivavensis


• Acanthagrion taxaense


• Acanthobrama centisquama


• Acanthobrama hadiyahensis


• Acanthobrama tricolor


• Acanthodactylus harranensis


• Acanthophoenix rubra


• Acer leipoense


• Achalinus jinggangensis


• Acharagma aguirreanum


• Achatinella apexfulva


• Achatinella bellula


• Achatinella bulimoides


• Achatinella byronii


• Achatinella cestus


• Achatinella concavospira


• Achatinella curta


• Achatinella decipiens


• Achatinella fulgens


• Achatinella fuscobasis


• Achatinella leucorraphe


• Achatinella lorata


• Achatinella mustelina


• Achatinella phaeozona


• Achatinella pulcherrima


• Achatinella pupukanioe


• Achatinella sowerbyana


• Achatinella stewartii


• Achatinella swiftii


• Achatinella taeniolata


• Achatinella turgida


• Achatinella viridans


• Achatinella vulpina


• Acheron spring goby


• Achyranthes mutica


• Achyrocline glandulosa


• Achyrocline mollis


• Acmopyle sahniana


• Acritodon nephophilus


• Actinella obserata


• Actinodaphne cuspidata


• Actinodaphne lanata


• Addax


• Adelobotrys panamensis


• Adenomus kandianus


• Adetomyrma venatrix


• Adrianichthys kruyti


• Adriatic sturgeon


• Aechmea cymosopaniculata


• Aegiphila caymanensis


• Aegiphila glomerata


• Aeolian wall lizard


• Aeranthes albidiflora


• Aetheolaena hypoleuca


• Aetheolaena ledifolia


• Aetheolaena pichinchensis


• Aethionema retsina


• Africallagma cuneistigma


• Afrogarypus seychellesensis


• Afrothismia baerae


• Afrothismia pachyantha


• Afrothismia winkleri


• Agalinis kingsii


• Agalychnis lemur


• Agasthiyamalaia pauciflora


• Agathis montana


• Agelanthus rondensis


• Aglaia densitricha


• Aglaia evansensis


• Aglaia gracilis


• Aglaia heterotricha


• Aglaia mackiana


• Aglaia malabarica


• Aglaia pleuropteris


• Aglaia unifolia


• Agrostistachys hookeri


• Aipysurus apraefrontalis


• Aipysurus foliosquama


• ‘Akeke‘e


• ʻAkikiki


• ʻAkohekohe


• Alabama cavefish


• Alabama sturgeon


• Alagoas antwren


• Tristan albatross


• Waved albatross


• Albericus siegfriedi


• Albizia vaughanii


• Alburnus macedonicus


• Alburnus mandrensis


• Alburnus nasreddini


• Alburnus timarensis


• Alburnus vistonicus


• Alchichica silverside


• Alcorn's pocket gopher


• Aldabra banded snail


• Alectryon macrococcus


• Alexteroon jynx


• Allan's lerista


• Allium baytopiorum


• Allium czelghauricum


• Allobates juanii


• Allochrusa takhtajanii


• Allophylus hispidus


• Allotoca maculata


• Almirante Trail toad


• Alocasia sanderiana


• Aloe dorotheae


• Aloe jucunda


• Aloe pembana


• Aloidendron pillansii


• Alosa vistonica


• Alphonsea kingii


• Alsinidendron lychnoides


• Alsinidendron obovatum


• Alsinidendron trinerve


• Alsinidendron viscosum


• Alsodes pehuenche


• Alsodes vanzolinii


• Alycaeus balingensis


• Alzoniella iberopyrenaica


• Alzoniella marianae


• Amanipodagrion


• Amanoa anomala


• Amastra cylindrica


• Amastra micans


• Amastra rubens


• Amastra spirizona


• Amatola toad


• Puerto Rican amazon


• Amblema neislerii


• American chestnut


• Amji's salamander


• Ammersee kilch


• Ammobates dusmeti


• Amphilophus zaliosus


• Amphitecna spathicalyx


• Amsinckia marginata


• Amsonia orientalis


• Amu Darya sturgeon


• Amur leopard


• Anabarilius andersoni


• Anabarilius qiluensis


• Anabarilius yangzonensis


• Ancylus ashangiensis


• Andaman shrew


• Andasta siltte


• Andean catfish


• Anderson's salamander


• Andinobates abditus


• Andropogon benthamianus


• Angel Island mouse


• Argentine angelshark


• Sawback angelshark


• Smoothback angelshark


• Angonoka tortoise


• Aniba pedicellata


• Anilany helenae


• Anisogomphus solitaris


• Anisoptera curtisii


• Anisoptera megistocarpa


• Anisoptera reticulata


• Anisoptera scaphula


• Annobón lidless skink


• Annona ecuadorensis


• Annona hystricoides


• Annona manabiensis