canine
/ˈkeɪˌnaɪn/
noun
a member of the dog family, including domestic dogs, wolves, foxes, and related animals
"The vet cares for all canine patients with great kindness."
"The canine rescue team worked tirelessly through the night to find the missing hikers in the forest."
crepuscular
/kɹɛpˈʌskjʊlɚ/
adjective
(of an animal) active during the twilight hours of dawn and dusk
"Rabbits are crepuscular animals."
"Deer are crepuscular animals which means they are most active during the early morning and late evening hours of the day."
arboreal
/ɑɹˈbɔɹiəɫ/
adjective
(of animals) adapted to or living high in trees, rather than on the ground
"Monkeys are arboreal."
"The arboreal monkey rarely comes down from the trees and it swings from branch to branch using its long tail for balance."
simian
/ˈsɪmiən/
adjective
of or relating to monkeys or apes
"He has simian features."
"The simian features of the chimpanzee including its opposable thumbs and forward facing eyes are very similar to those of human beings."
terrestrial
/tɝˈɛstɹiəɫ/
adjective
related to or living on land, rather than in the sea or air
"Turtles can be terrestrial."
"Turtles can be both aquatic and terrestrial depending on the species but some turtles live entirely on land away from any water sources."
nocturnal
/nɑkˈtɝnəɫ/
adjective
(of animals or organisms) primarily active during the night
"Owls are nocturnal."
"The nocturnal owl hunts at night and sleeps during the day using its excellent vision to see in near darkness."
diurnal
/daɪˈɝnəɫ/
adjective
primarily active or occurring during the daytime
"Squirrels are diurnal."
"Squirrels are diurnal animals so they are active during the day and sleep in their nests at night to avoid predators and darkness."