Connecticut is a rich mix of habitats filled with hundreds of fascinating animals. How many of these creatures have you encountered? Visit our Great Hikes page and bring your binoculars. We live in an amazingly beautiful state!

Species Viability Code

I=Introduced	E=Range/species expanding
F=Feral	D=Declining/threatened

Amphibians & Reptiles

	Blue-spotted Salamander	Ambystoma laterale
	Bullfrog	Rana catesbeiana
	Eastern American Toad	Bufo americanus americanus
D	Eastern Spadefoot	Scaphiopus holbrookii
	Four-toed Salamander	Hemidactylium scutatum
	Fowler’s Toad	Bufo woodhousii fowleri
	Gray Treefrog	Hyla versicolor
	Green Frog	Rana clamitans melanota
	Jefferson Salamander	Ambystoma jeffersonianum
	Marbled Salamander	Ambystoma opacum
	Mudpuppy	Necturus maculosus maculosus
	Northern Dusky Salamander	Desmognathus fuscus fuscus
	Northern Leopard Frog	Rana pipiens
	Northern Spring Peeper	Hyla crucifer crucifer
D	Northern Slimy Salamander	Plethodon glutinosus
D	Northern Spring Salamander	Gyrinophilus porphyriticus
	Northern Two-Lined Salamander	Eurycea bislineata bislineata
	Pickerel Frog	Rana palustris
	Redback Salamander	Plethodon cinereus
	Red-spotted Newt	Notophthalmus viridescens viridescens
	Spotted Salamander	Ambystoma maculatum
	Wood Frog	Rana sylvatica
	Black Rat Snake	Elaphe obsoleta obsoleta
D	Bog Turtle	Clemmys muhlenbergii
	Common Snapping Turtle	Chelydra serpentina serpentina
	Eastern Garter Snake	Thamnophis sirtalis sirtalis
	Eastern Hognose Snake	Heterodon platyrhinos
	Eastern Milk Snake	Lampropeltis triangulum triangulum
	Eastern Painted Turtle	Chrysemys picta picta
	Eastern Ribbon Snake	Thamnophis sauritus
	Eastern Smooth Green Snake	Opheodrys vernalis vernalis
	Eastern Worm Snake	Carphophis amoenus amoenus
D	Five-lined Skink	Eumeces fasciatus
	Midland Painted Turtle	Chrysemys picta marginata
	Northern Brown Snake	Storeria dekayi dekayi
	Northern Copperhead	Agkistrodon contortrix mokeson
	Northern Black Racer	Coluber constrictor constrictor
	Northern Redbelly Snake	Storeria occipitomaculata occipitomaculata
	Northern Ringneck Snake	Diadophis punctatus edwardsi
	Northern Water Snake	Nerodia sipedon sipedon
	Red-eared Slider	Pseudemys scripta elegans
	Spotted Turtle	Clemmys guttata
	Stinkpot	Sternotherus odoratus
D	Timber Rattlesnake	Crotalus horridus
	Wood Turtle	Clemmys insculpta

Reptiles

D	Loggerhead Turtle	Caretta caretta
D	Atlantic Green Turtle	Chelonia mydas
D	Leatherback Turtle	Dermochelys coriacea
D	Atlantic Ridley Turtle	Lepidochelys kempii

Birds

E	Acadian Flycatcher	Empidonax virescens
	Alder Flycatcher	Empidonax alnorum
D	American Black Duck	Anas rubripes
D	American Bittern	Botaurus lentiginosus
D	American Coot	Fulica americana
E	American Crow	Corvus brachyrhynchos
	American Goldfinch	Carduelis tristis
	American Kestrel	Falco sparverius
	American Oystercatcher	Haematopus palliatus
	American Pipit	Anthus rubescens
D	American Redstart	Setophaga ruticilla
	American Robin	Turdus migratorius
D	American Tree Sparrow	Spizella arborea
E	American Wigeon	Anas americana
	American Woodcock	Scolopax minor
D	Baird’s Sandpiper	Calidris bairdii
	Bald Eagle	Haliaeetus leucocephalus
D	Bank Swallow	Riparia riparia
D	Barn Owl	Tyto alba
	Barn Swallow	Hirundo rustica
D	Barred Owl	Strix varia
	Bay-breasted Warbler	Dendroica castanea
	Belted Kingfisher	Ceryle alcyon
D	Black-backed Woodpecker	Picoides arcticus
	Black-capped Chickadee	Parus atricapillus
D	Black-crowned Night?Heron	Nycticorax nycticorax
	Black-bellied Plover	Pluvialis squatarola
D	Black-billed Cuckoo	Coccyzus erythropthalmus
D	Black-throated Blue Warbler	Dendroica caerulescens
D	Black-throated Green Warbler	Dendroica virens
	Blackburnian Warbler	Dendroica fusca
	Blackpoll Warbler	Dendroica striata
E	Black & White Warbler	Mniotilta varia
D	Black Rail	Laterallus jamaicensis
	Black Scoter	Melanitta nigra
D	Black Tern	Chlidonias niger
E	Black Vulture	Coragyps atratus
E	Blue-gray Gnatcatcher	Polioptila caerulea
D	Blue-winged Teal	Anas discors
IE	Blue-winged Warbler	Vermivora pinus
	Blue Grosbeak	Guiraca caerulea
	Blue Jay	Cyanocitta cristata
	Bobolink	Dolichonyx oryzivorus
	Bonaparte’s Gull	Larus philadelphia
	Brant	Branta bernicla
E	Broad-winged Hawk	Buteo platypterus
	Brown-headed Cowbird	Molothrus ater
	Brown Creeper	Certhia americana
D	Brown Thrasher	Toxostoma rufum
	Buff-breasted Sandpiper	Tryngites subruficollis
	Bufflehead	Bucephala albeola
	Canada Goose	Branta canadensis
	Canada Warbler	Wilsonia canadensis
E	Canvasback	Aythya valisineria
	Cape May Warbler	Dendroica tigrina
E	Carolina Wren	Thryothorus ludovicianus
D	Caspian Tern	Sterna caspia
IE	Cattle Egret	Bubulcus ibis
	Cedar Waxwing	Bombycilla cedorum
	Cerulean Warbler	Dendroica cerulea
	Chestnut-sided Warbler	Dendroica pensylvanica
D	Chimney Swift	Chaetura pelagica
	Chipping Sparrow	Spizella passerina
	Chuck-will’s widow	Caprimulgus carolinensis
D	Clapper Rail	Rallus longirostris
	Clay-colored Sparrow	Spizella pallida
E	Cliff Swallow	Hirundo pyrrhonota
	Common Eider	Somateria mollissima
	Common Grackle	Quiscalus quiscula
	Common Goldeneye	Bucephala clangula
D	Common Loon	Gavia immer
	Common Merganser	Mergus merganser
D	Common Moorhen	Gallinula chloropus
D	Common Nighthawk	Chrodeiles minor
E	Common Raven	Corvus corax
	Common Snipe	Gallinago gallinago
	Common Tern	Sterna hirundo
	Common Yellowthroat	Geothlypis trichas
D	Connecticut Warbler	Oporornis agilis
D	Cooper’s Hawk	Accipiter cooperii
	Dark-eyed Junco	Junco hyemalis
	Dickcissel	Spiza americana
E	Double-crested Cormorant	Phalacrocorax auritus
	Downy Woodpecker	Picoides pubescens
	Dunlin	Calidris alpina
	Eared Grebe	Podiceps nigricollis
D	Eastern Bluebird	Sialia sialis
	Eastern Kingbird	Tyrannus tyrannus
D	Eastern Meadowlark	Sturnella magna
D	Eastern Phoebe	Sayornis phoebe
	Eastern Screech Owl	Otus asio
D	Eastern Wood Pewee	Contopus virens
	Eskimo Curlew	Numenius borealis
I	Eurasian Jackdaw	Corvus monedula
I	European Starling	Sturnus vulgaris
	Evening Grosbeak	Coccothraustes vespertinus
D	Field Sparrow	Spizella pusilla
E	Fish Crow	Corvus ossifragus
E	Forster’s Tern	Sterna forsteri
	Fox Sparrow	Passerella iliaca
E	Gadwall	Anas strepera
	Glaucous Gull	Larus hyperboreus
	Glossy Ibis	Plegadis falcinellus
	Golden-crowned Kinglet	Regulus satrapa
D	Golden-winged Warbler	Vermivora chrysoptera
D	Golden Eagle	Aquila chrysaetos
D	Grasshopper Sparrow	Ammodramus savannarum
D	Gray-cheeked Thrush	Catharus minimus
	Gray Catbird	Dumetella carolinensis
E	Great Black-backed Gull	Larus marinus
E	Great Blue Heron	Ardea herodias
D	Great Crested Flycatcher	Myiarchus crinitus
	Great Cormorant	Phalacrocorax carbo
	Great Egret	Casmerodius albus
E	Great Horned Owl	Bubo virginianus
D	Greater Scaup	Aythya marila
	Greater Yellowlegs	Tringa melanoleuca
	Green-backed Heron	Butorides striatus
	Green-winged Teal	Anas crecca
	Hairy Woodpecker	Picoides villosus
D	Harlequin Duck	Histrionicus histrionicus
D	Hermit Thrush	Catharus guttatus
	Herring Gull	Larus argentatus
	Hooded Merganser	Lophodytes cucullatus
	Hooded Warbler	Wilsonia citrina
E	Horned Grebe	Podiceps auritus
D	Horned Lark	Eremophila alpestris
IE	House Finch	Carpodacus mexicanus
ID	House Sparrow	Passer domesticus
D	House Wren	Troglodytes aedon
	Hudsonian Godwit	Limosa haemastica
D	Indigo Bunting	Passerina cyanea
	Ipswich Sparrow	Passerculus sandwichensis
	Kentucky Warbler	Oporornis formosus
	Killdeer	Charadrius vociferus
	King Eider	Somateria spectabilis
D	King Rail	Rallus elegans
E	Lark Sparrow	Chondestes grammacus
	Laughing Gull	Larus atricilla
D	Least Bittern	Ixobrychus exilis
D	Least Flycatcher	Empidonax minimus
	Least Sandpiper	Calidris minutilla
D	Least Tern	Sterna antillarum
	Lesser Black-backed Gull	Larus fuscus
	Lesser Golden P Lover	Pluvialis dominica
D	Lesser Scaup	Aythya affinis
	Lincoln’s Sparrow	Melospiza lincolnii
E	Little Blue Heron	Egretta caerulea
E	Little Gull	Larus minutus
D	Loggerhead Shrike	Lanius ludovicianus
D	Long-eared Owl	Asio otus
	Louisiana Waterthrush	Seiurus motacilla
	Magnolia Warbler	Dendroica magnolia
IF	Mallard	Anas platyrhynchos
D	Marbled Godwit	Limoas fedoa
D	Marsh Wren	Cistothorus palustris
	Merlin	Falco columbarius
IE	Monk Parakeet	Myiopsitta monachus
	Mourning Dove	Zenaida macroura
	Mourning Warbler	Oporornis philadelphia
IE	Mute Swan	Cygnus olor
D	Nashville Warbler	Vermivora ruficapilla
D	Northern Bobwhite	Colinus virginianus
	Northern Cardinal	Cardinalis cardinalis
D	Northern Flicker	Colaptes auratus
E	Northern Gannet	Morus bassanus
E	Northern Goshawk	Accipiter gentilis
D	Northern Harrier	Circus cyaneus
E	Northern Mockingbird	Mimus polyglottos
E	Northern Oriole	Icterus galbula
D	Northern Parula	Parula americana
	Northern Pintail	Anas acuta
E	Northern Rough-winged Swallow	Stelgidopteryx ruficollis
D	Northern Saw-whet Owl	Aegolius acadicus
	Northern Shoveler	Anas clypeata
D	Northern Shrike	Lanius excubitor
	Northern Waterthrush	Seiurus novebor acensis
D	Oldsquaw	Clangula hyemalis
	Olive-sided Flycatcher	Contopus borealis
D	Orange-crowned Warbler	Vermivora celata
E	Orchard Oriole	Icterus spurius
E	Osprey	Pandion haliaetus
	Ovenbird	Seiurus aurocapillus
	Palm Warbler	Dendroica palm arum
	Pectoral Sandpiper	Calidris melanotos
D	Peregrine Falcon	Falco peregrinus
	Philadelphia Vireo	Vireo philadelphicus
DE	Pied-billed Grebe	Podilymbus podiceps
E	Pileated Woodpecker	Dryocopus pileatus
	Pine Siskin	Carduelis pinus
D	Pine Warbler	Dendroica pinus
D	Piping Plover	Charadrius melodus
	Prairie Warbler	Dendroica discolor
	Prothonotary Warbler	Protonotaria citrea
	Purple Finch	Carpodacus purpureus
D	Purple Gallinule	Porphyrula martinica
D	Purple Martin	Progne subis
	Purple Sandpiper	Calidris maritima
E	Red-bellied Woodpecker	Malanerpes carolinus
	Red-breasted Merganser	Mergus serrator
	Red-breasted Nuthatch	Sitta canadensis
D	Red-eyed Vireo	Vireo olivaceus
D	Red-headed Woodpecker	Melanerpes erythrocephalus
	Red-necked Grebe	Podiceps grisengena
D	Red-shouldered Hawk	Buteo lineatus
	Red-winged Blackbird	Agelaius phoeniceus
	Red-tailed Hawk	Buteo jamaicensis
	Red-throated Loon	Gavia stellata
E	Red Knot	Calidris canutus
E	Ring-billed Gull	Larus delawarensis
	Ring-necked Duck	Aythya collaris
ID	Ring-necked Pheasant	Phasianus colchicus
IF	Rock Dove	Columba livia
	Rose-breasted Grosbeak	Pheucticus ludovicianus
D	Roseate Tern	Sterna dougallii
	Rough-legged Hawk	Buteo lagopus
	Royal Tern	Sterna maxima
E	Ruby-crowned Kinglet	Regulus calendula
D	Ruby-throated Hummingbird	Archilochus colubris
	Ruddy Duck	Oxyura jamaicensis
	Ruddy Turnstone	Arenaria interpres
	Ruff	Philomachus pugnax
	Ruffed Grouse	Bonasa umbellus
	Rufous-sided Towhee	Pipilo erythrophthalmus
	Sanderling	Calidris alba
D	Savannah Sparrow	Passerculus sandwichensis
	Scarlet Tanager	Piranga olivacea
	Seaside Sparrow	Ammodramus maritimus
D	Sedge Wren	Cistothorus platensis
	Semipalmated Plover	Charadrius semipalm atus
	Semipalmated Sandpiper	Calidris pusilla
D	Sharp-shinned Hawk	Accipiter striatus
D	Sharp-tailed Sparrow	Ammodramus caudacutus
	Sharp-billed Dowitcher	Limnodromus griseus
D	Short-eared Owl	Asio flammeus
DE	Snowy Egret	Egretta thula
	Snowy Owl	Nyctea scandiaca
	Solitary Vireo	Vireo solitarius
	Spotted Sandpiper	Actitus macularia
D	Stilt Sandpiper	Calidris himantopus
	Surf Scoter	Melanitta perspicillata
	Snow Bunting	Plectrophenax nivalis
	Snow Goose	Chen caerulescens
	Song Sparrow	Melospiza melodia
	Sora	Parzana carolina
D	Summer Tanager	Piranga rubra
	Swainson’s Thrush	Catharus ustulatus
E	Swamp Sparrow	Melospiza georgiana
	Tennessee Warbler	Vermivora peregrina
E	Tree Swallow	Tachycineta bicolor
	Tri-colored Heron	Egretta tricolor
E	Tufted Titmouse	Parus bicolor
E	Turkey Vulture	Cathartes aura
D	Upland Sandpiper	Bartramia longicauda
D	Veery	Catharus fuscescens
D	Vesper Sparrow	Pooecetes gramineus
D	Virginia Rail	Rallus limicola
E	Warbling Vireo	Vireo gilvus
E	Western Kingbird	Tyrannus verticalis
	Western Sandpiper	Calidris mauri
D	Whimbrel	Numenius phaeopus
D	Whip-poor-will	Caprimulgus vociferus
E	White-breasted Nuthatch	Sitta carolinensis
	White-crowned Sparrow	Zonotrichia leucophrys
E	White-eyed Vireo	Vireo griseus
	White-rumped Sandpiper	Calidris fuscicollis
	White-throated Sparrow	Zonotrichia albicollis
D	White-winged Scoter	Melanitta fusca
E	Wild Turkey	Meleagris gallopavo
	Willet	Catoptrophorus semipalmatus
E	Willow Flycatcher	Empidonax traillii
D	Wilson’s Phalarope	Phalaropus tricolor
D	Wilson’s Plover	Charadrius wilsonia
	Wilson’s Warbler	Wilsonia pusilla
E	Winter Wren	Troglodytes troglodytes
	Wood Duck	Aix sponsa
E	Wood Thrush	Hylocichla mustelina
E	Worm-eating Warbler	Helmitheros vermivorus
	Yellow-bellied Flycatcher	Empidonax flaviventris
D	Yellow-bellied Sapsucker	Sphyrapicus varius
D	Yellow-billed Cuckoo	Coccyzus americanus
D	Yellow-breasted Chat	Icteria virens
	Yellow-crowned Night-Heron	Nyctanassa violacea
	Yellow-rumped Warbler	Dendroica coronata
D	Yellow-throated Vireo	Vireo flavifrons
	Yellow-throated Warbler	Dendroica dominica
D	Yellow Warbler	Dendroica petechia

Mammals

	Beaver	Castor canadensis
	Big Brown Bat	Eptesicus fuscus
E	Black Bear	Ursus americanus
	Bobcat	Lynx rufus
E	Coyotes	Canis latrans
	Deer Mouse	Peromyscus maniculatus
	Eastern Cottontail	Sylvilagus floridanus
	Eastern Chipmunk	Tamias striatus
	Eastern Mole	Scalopus aquaticus aquaticus
	Eastern Pipistrelle	Pipistrellus subflavus obscurus
	Ermine	Mustela erminea cicognanii
I	European Hare	Lepus europaeus
	Fisher	Martes pennanti pennanti
	Gapper’s Red-backed Mouse	Clethrionomys gapperi
	Grey Fox	Urocyon cinereoargenteus
	Grey Seal	Halichoerus grypus
	Grey Squirrel	Sciurus carolinensis pennsylvanicus
	Hairy-tailed Mole	Parascalops breweri
	Harbor Porpoise	Phocoena phocoena
	Hoary Bat	Lasiurus cinereus
I	House Mouse	Mus musculus
	Keen’s Myotis	Myotis keenii septentrionalis
D	Least Shrew	Cryptotis parva
	Little Brown Myotis	Myotis lucifugus
	Long-tailed Weasel	Mustela freneta
D	Lynx	Lynx canadensis
	Marten	Martes americana americana
	Masked Shrew	Sorex cinereus cinereus
	Meadow Jumper	Zapus hudsonius
	Meadow Vole	Microtus pennsylvanicus
	Mink	Mustela vison
E	Moose	Alces alces americana
	Muskrat	Ondatra zibethicus
D	New England Cottontail	Silvilagus transitionalis
	Northern Flying Squirrel	Glaucomys sabrinus macrotis
I	Norway Rat	Rattus norvegicus
	Pine Vole	Microtus pinetorum scalopsoides
	Porcupine	Erethizon dorsatum dorsatum
	Raccoon	Procyon lotor
	Red Bat	Lasiurus borealis
	Red Fox	Vulpes vulpes
	Red Squirrel	Tamiasciurus hudsonicus
	River Otter	Lutra canadensis
	Short-tailed Shrew	Blarina brevicauda
	Silver-haired Bat	Lasionycteris moctivagans
	Small-footed Myotis	Myotis leibii leibii
	Smoky Shrew	Sorex fumeus
	Snowshoe Hare	Lepus americanus
	Southern Bog Lemming	Synaptomys cooperi
	Southern Flying Squirrel	Glaucomys volans
	Star-nosed Mole	Condylura cristata
	Thompson’s Pygmy Shrew	Microsorex thompsoni thompsoni
	Virginia Opossum	Didelphis virginiana
	Water Shrew	Sorex palustris albibarbus
	White-footed Mouse	Peromyscus leucopus
	White-tailed Deer	Odocoileus virginianus borealis
	Woodchucks	Marmota monax
	Woodland Jumping Mouse	Napaeozapus insignis