ancient
animal
antique
biology
black
era
extinct
extinction
giant
gigantic sloths
herbivore
herbivorous
history
huge beast
illustration
isolated
mammal
mammalogy
megalonyx
megatheriid
megatheriidae
megatherium
old
paleontology
picture
pleistocene
pliocene
prehistoric
primeval
silhouette
sloth
species
vertebrate
wild
wildlife
zoological
zoology