Declining Populations Animals
About this Page
- ZipcodeZoo detects declining populations by comparing two observation rates: the number of observations reported for the species each year, and the number of observations reported for that species' taxonomic Class each year. If the species is a declining percentage of all such observations, we have good reason to suspect that this change is a result of population decline.
- These findings are machine-generated, and are only suggestive. For each of the species listed below, further research may be appropriate. For more info about our analyses, click here.
Index by Species
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- Abra nitida
- Abra tenuis
- Abrostola asclepiadis
- Abrostola trigemina
- Abrostola triplasia
- Abudefduf sordidus
- Acanthodoris pilosa
- Acanthurus monroviae
- Acartia longiremis
- Achaea ablunaris
- Acharia nesea
- Acharia ophelians
- Achyla flavicornis
- Aclytia punctata
- Acontia luctuosa
- Acricotopus lucens
- Acrocephalus arundinaceus
- Acrocephalus dumetorum
- Acrocephalus griseldis
- Acrocephalus melanopogon
- Acrocephalus mendanae
- Acrocephalus palustris
- Acrocephalus scirpaceus
- Acronicta aceris
- Acronicta euphorbiae
- Acronicta strigosa
- Acropoma japonicum
- Acrosemia vulpecularia
- Acrotomia viminaria
- Actaea rubra
- Actaea spicata
- Actebia praecox
- Actinia fragacea
- Actinothoe sphyrodeta
- Actinotia polyodon
- Adhemarius fulvescens
- Adopaea lineola
- Adopaea silvester
- Aedia funesta
- Aegithalos caudatus
- Aeolidia papillosa
- Aeshna grandis
- Aeshna juncea subsp. angustistyla
- Aethes smeathmanniana
- Agabus affinis
- Agabus arcticus
- Agabus congener
- Agabus guttatus
- Agapetes galathea
- Aglia tau
- Agriades glandon
- Agrilus angustulus
- Agriocoris flavipes
- Agrius cingulata
- Agrochola circellaris
- Agrochola helvola
- Agrochola laevis
- Agrochola litura
- Agrochola lota
- Agrochola macilenta
- Agrochola nitida
- Agrotis cinerea
- Agrotis clavis
- Agrotis fatidica
- Agrotis puta
- Agrotis segetum
- Agrotis venustula
- Agrypnus aristatus
- Aimophila aestivalis
- Aimophila ruficauda
- Ajaia ajaja
- Albula vulpes
- Alcis maculata
- Alcyonium digitatum
- Aldrichetta forsteri
- Alectis ciliaris
- Alentia gelatinosa
- Alepisaurus brevirostris
- Alepocephalus australis
- Alkmaria romijni
- Alle alle
- Allocyttus verrucosus
- Allophyes oxyacanthae
- Alosa aestivalis
- Aluterus schoepfii
- Amathes ashworthii
- Amathes baja
- Amathes castanea
- Amathes ditrapezium
- Amathes rhomboidea
- Amathes triangulum
- Amathes xanthographa
- Amaxia apyga
- Amazona viridigenalis
- Amblyraja radiata
- Amblyscirtes vialis
- Ammoconia caecimacula
- Ampharete acutifrons
- Ampharete baltica
- Ampharete finmarchica
- Amphilius uranoscopus
- Amphilochus neapolitanus
- Amphinemura sulcicollis
- Amphipoea lucens
- Amphipoea oculea
- Amphipyra perflua
- Amphipyra pyramidea
- Amphipyra tragopoginis
- Amphistomus complanatus
- Anaglyptus mysticus
- Anaitides groenlandica
- Anaitides maculata
- Anaitis praeformata
- Anaplectoides prasina
- Anaplectoides pressus
- Anarhichas denticulatus
- Anarhichas minor
- Anartia fatima
- Anas oustaleti
- Anasimyia contracta
- Anasimyia transfuga
- Anatopynia plumipes
- Anatrytone logan
- Ancistrocerus claripennis
- Ancistrocerus nigricornis
- Ancistrocerus parietinus
- Ancistrocerus trifasciatus
- Ancylis badiana
- Andrena proxima
- Aneides lugubris
- Anelasmocephalus cambridgei
- Aneura pinguis
- Angerona prunaria
- Anguilla rostrata
- Anicla infecta
- Anisus vorticulus
- Anomia ephippium
- Anomis illita
- Anoplogaster cornuta
- Anoplopoma fimbria
- Anotopterus pharao
- Anous stolidus stolidus
- Anser caerulescens
- Antaea lichyi
- Antechinus agilis
- Antechinus swainsonii
- Antedon bifida
- Anthus trivialis
- Anticarsia gemmatalis
- Antigonia capros
- Antitype chi
- Antrozous pallidus
- Apamea anceps
- Apamea characterea
- Apamea crenata
- Apamea epomidion
- Apamea furva
- Apamea illyria
- Apamea lateritia
- Apamea maillardi
- Apamea mixta
- Apamea ophiogramma
- Apamea platinea
- Apamea rubrirena
- Apamea scolopacina
- Apamea sordens
- Apamea sublustris
- Apamea zeta
- Apatele alni
- Apatele leporina
- Apatele psi
- Apatelodes merlona
- Apela neobule
- Aphanius anatoliae anatoliae
- Aphriza virgata
- Apistus carinatus
- Aplodinotus grunniens
- Apoda limacodes
- Apodemus agrarius
- Apogon flavus
- Apogon fleurieu
- Apogon lativittatus
- Apogon novemfasciatus
- Apogon relativus
- Apogon selas
- Apogon septemstriatus
- Apogon sinus
- Apoica pallens
- Apoica thoracica
- Aporophyla nigra
- Aporrhais pespelecani
- Apsectrotanypus trifascipennis
- Apus apus
- Aquila clanga
- Aquila nipalensis
- Aquila pomarina
- Arachnoidea prenanti
- Arachnospila anceps
- Arachnospila spissa
- Araeosoma coriaceum
- Aramus guarauna
- Araneus marmoreus
- Araniella displicata
- Archanara sparganii
- Archodontes melanopus aridus
- Arctia caja
- Arctia villica
- Arctornis l-nigrum
- Arctozenus risso
- Ardea purpurea
- Arenicola marina
- Argentina silus
- Argidia subvelata
- Argissa hamatipes
- Argulus foliaceus
- Argyresthia goedartella
- Argyrogramma verruca
- Argyroneta aquatica
- Argyropelecus aculeatus
- Argyropelecus hemigymnus
- Argyrosomus thorpei
- Argyrozona argyrozona
- Arhopalus rusticus obsoletus
- Arichanna melanaria
- Aricidea jeffreysi
- Aricidea minuta
- Arius heudelotii
- Arius thalassinus
- Armadillidium depressum
- Armadillidium nasatum
- Armiger crista
- Arremonops conirostris
- Arrenurus affinis
- Arrenurus bifidicodulus
- Arrenurus bruzelii
- Arrenurus buccinator
- Arrenurus crassicaudatus
- Arrenurus cuspidifer
- Arrenurus fimbriatus
- Arripis trutta
- Artediellus uncinatus
- Artibeus intermedius intermedius
- Artibeus jamaicensis
- Artibeus lituratus
- Ascidia challengeri
- Ascidia conchilega
- Asterropteryx semipunctata
- Asthena albulata
- Astreopora myriophthalma
- Atelecyclus rotundatus
- Atethmia centrago
- Atheresthes stomias
- Athetis gluteosa
- Athetis pallustris
- Athripsodes bilineatus
- Atopos australis
- Atrosalarias fuscus holomelas
- Atule mate
- Atypha pulmonaris
- Auchmis comma
- Australothis rubrescens
- Austroglossus microlepis
- Austrolestes psyche
- Austrolimnophila ochracea
- Austropeplea tormentosa
- Autographa bractea
- Autographa buraetica
- Autographa jota
- Autographa pulchrina
- Automeris banus
- Automeris belti
- Automeris zugana
- Aythya nyroca
- Azya orbigera
Last Revised: September 30, 2008