Crepuscular animal

crepusculardawn and duskactive during twilightactive in the morning and eveningat dawn and duskat duskat twilightcrespuscularduring twilightdusk and dawn
Crepuscular animals are those that are active primarily during twilight (that is, the periods of dawn and dusk).wikipedia
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Twilight

civil twilightastronomical twilightnautical twilight
Crepuscular animals are those that are active primarily during twilight (that is, the periods of dawn and dusk).
The collateral adjective for twilight is crepuscular, which may be used to describe the behavior of animals that are most active during this period.

Matutinal

matinal
The term matutinal is used for animals that are active only before sunrise, and vespertine for those active only after sunset.
In ecology, matutinal (or, in entomological writings, matinal ) crepuscular animals are those that are significantly active during pre-dawn or early morning hours.

Diurnality

diurnaldiurnal activityactive during the day
This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daylight or the hours of darkness, respectively.
Animals active during twilight are crepuscular, those active during the night are nocturnal, and animals active at sporadic times during both night and day are cathemeral.

Nocturnality

nocturnalnocturnal animalnocturnally
This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daylight or the hours of darkness, respectively.
Crepuscular species, such as rabbits, skunks, tigers, and hyenas, are often erroneously referred to as nocturnal.

Hamster

Cricetinaehamsterscricetine
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
Hamsters are more crepuscular than nocturnal and, in the wild, remain underground during the day to avoid being caught by predators.

Vespertine (biology)

vespertinevespertines
The term matutinal is used for animals that are active only before sunrise, and vespertine for those active only after sunset. Many moths, beetles, flies, and other insects are crepuscular and vespertine.
Vespertine behaviour is a special case of crepuscular behaviour; like crepuscular activity, vespertine activity is limited to dusk rather than full darkness.

Ferret

ferretsMustela putorius furoDomestic Ferret
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
Ferrets spend 14–18 hours a day asleep and are most active around the hours of dawn and dusk, meaning they are crepuscular If they are caged, they should be taken out daily to exercise and satisfy their curiosity; they need at least an hour and a place to play.

Guinea pig

guinea pigsCavia porcelluscuy
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
They tend to be most active during dawn and dusk (crepuscular), when it is harder for predators to spot them.

Chinchilla

chinchillasdomestic chinchillathe rodent by that name
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
Chinchillas are either of two species (Chinchilla chinchilla and Chinchilla lanigera) of crepuscular rodents of the parvorder Caviomorpha.

Cat

domestic catcatsFelis catus
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
The timing of cats' activity is quite flexible and varied, which means house cats may be more active in the morning and evening, as a response to greater human activity at these times.

Rabbit

rabbitsbunnybunnies
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
Rabbits may appear to be crepuscular, but their natural inclination is toward nocturnal activity.

Wombat

wombatsVombatidaeWombat Day
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
Although mainly crepuscular and nocturnal, wombats may also venture out to feed on cool or overcast days.

Bat

batsChiropterachiropteran
Many familiar mammal species are crepuscular, including some bats, hamsters, housecats, stray dogs, rabbits, ferrets, guinea pigs and rats.
Most microbats are nocturnal and megabats are typically diurnal or crepuscular.

Red panda

red pandasAiluruslesser panda
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
It has been reported to be both nocturnal and crepuscular, sleeping on tree branches or in tree hollows during the day and increasing its activity in the late afternoon and early evening hours.

Bobcat

bobcatsLynx rufusWildcats
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
The bobcat is crepuscular, and is active mostly during twilight.

Common nighthawk

Chordeiles minorbull batsChordeiles virginianus
Crepuscular birds include the common nighthawk, barn owl, owlet-nightjar, chimney swift, American woodcock, spotted crake, and white-breasted waterhen.
The common nighthawk (Chordeiles minor) is a medium-sized crepuscular or nocturnal bird of the Americas within the nightjar family, whose presence and identity are best revealed by its vocalization.

Short-eared owl

Asio flammeusowlA. flammeus
For example, the subspecies of short-eared owl that lives on the Galápagos Islands is normally active during the day, but on islands like Santa Cruz that are home to the Galapagos hawk, the owl is crepuscular.
Hunting occurs mostly at night, but this owl is known to be diurnal and crepuscular as well.

Owlet-nightjar

AegothelidaeAegothelesAegotheliformes
Crepuscular birds include the common nighthawk, barn owl, owlet-nightjar, chimney swift, American woodcock, spotted crake, and white-breasted waterhen.
Owlet-nightjars are small crepuscular birds related to the nightjars and frogmouths.

Jaguar

Panthera oncajaguarsYaguareté
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
The jaguar is often described as nocturnal, but is more specifically crepuscular (peak activity around dawn and dusk).

Skunk

skunksMephitidaechingue
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
Skunks are crepuscular and solitary animals when not breeding, though in the colder parts of their range, they may gather in communal dens for warmth.

Squirrel

Sciuridaesquirrelssciurid
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
Ground squirrels and tree squirrels are usually either diurnal or crepuscular, while the flying squirrels tend to be nocturnal—except for lactating flying squirrels and their young, which have a period of diurnality during the summer.

Ocelot

ocelotsLeopardus pardalisTexas ocelot
Other crepuscular mammals include jaguars, ocelots, bobcats, strepsirrhines, red pandas, bears, deer, moose, sitatunga, capybaras, chinchillas, the common mouse, skunks, squirrels, Australian wombats, wallabies, quolls, possums and marsupial gliders, tenrecs, spotted hyenas, and African wild dogs.
The ocelot is usually solitary and crepuscular.

Moth

mothsHeteroceraattracted to articifial lights
Many moths, beetles, flies, and other insects are crepuscular and vespertine.
Most species of moth are nocturnal, but there are also crepuscular and diurnal species.

American woodcock

Scolopax minorwoodcockTimber Doodle
Crepuscular birds include the common nighthawk, barn owl, owlet-nightjar, chimney swift, American woodcock, spotted crake, and white-breasted waterhen.
Woodcock are crepuscular, being most active at dawn and dusk.

Cathemerality

cathemeralmetaturnal
Many animals do not fit the traditional definitions of being strictly nocturnal, diurnal, or crepuscular, often by factors that include the availability of food, predation pressure, and variable ambient temperature.