"Yaks are bovid species endemic to high-altitude cold regions, adapted to low-oxygen environments, and are important livestock in Tibet."

"Pangolins are covered in keratinous scales, the only mammals with scales, and curl into a ball when threatened."

"Male birds-of-paradise have extremely ornate plumage and perform complex, elaborate courtship dances."

"Goldfish are ornamental varieties developed from crucian carp through long-term artificial selection, with diverse forms and colors."

"Poison dart frogs have extremely vibrant skin colors to warn predators of their potent toxins, which are derived from their diet."

"Male deer grow and shed antlers annually; antlers are bony structures."

"Seals have a thick layer of fat (blubber) to keep warm in cold water."

"Brown bears hibernate in winter, during which their heart rate and body temperature drop significantly to conserve energy."

"Moose are the largest deer species; males have huge, palmate antlers and a dewlap (bell) under their throat."

"Herring often form huge schools and are important forage fish in marine ecosystems."

"Male Northern Cardinals have striking bright red plumage; both males and females sing."

"Termites feed on cellulose from wood, can build complex nests, and some queens can live for decades."

"Anteaters have elongated snouts and long, sticky tongues specialized for feeding on ants and termites."

"Genets have slender bodies and ringed tails, are nocturnal, skilled climbers, and some species have musk glands."

"Flying squirrels have a gliding membrane (patagium) between their front and hind limbs, allowing them to glide from high to low places; they are nocturnal and arboreal."

"Duck feathers are highly waterproof, thanks to oil secreted by a gland near their tail."

"Koalas eat almost exclusively eucalyptus leaves, which are toxic and low in nutrients for most animals."

"Sea urchins are covered in spines for defense and movement and feed on algae or organic debris."

"Male cicadas have sound-producing organs (tymbals) on their abdomens, creating loud calls to attract females; larvae (nymphs) live underground for years."

"Moths are typically nocturnal, many are attracted to light (phototaxis), and they are more diverse in species and form than butterflies."