Powder Blue Surgeonfish
Native to the Indian Ocean, this nine-inch-long fish is a popular aquarium pet. Besides its black mask, much of the body is blue, and the dorsal fin is yellow.
Masked Flowerpiercer
This masked bird gets its name because it takes nectar from flowers. It does this through a tiny hook at the end of its beak which it uses to slice open the flower’s nectary.
Eurasian Penduline Tit
This tiny bird gets its name because it builds hanging nests over bodies of water. Only 2.96 to 4.33 inches long, it has a tiny, sharp bill, short round wings, and a notched tail as well as a black mask.
Maned Sloth
The maned sloth is endemic to Brazil, where it lives in the trees of the coastal rainforests. The sloth has gray or pale brown fur and a double coat
Slender Loris
This little primate is found in the forests of Sri Lanka and India. Its huge, round, front-facing eyes stare out of its mask. As it is one of those animals that come out at night, it needs those enormous eyes to see well in the dark
Spectacled Monarch
This masked animal isn’t a butterfly but a bird, and it’s native to the tropical, subtropical forests of Australia, Papua New Guinea, and Indonesia.
Spectacled Owl
Found in the tropical rainforests of Mexico down to Central and South America and into Trinidad and Tobago, this owl’s huge yellow eyes stare out from its dark mask
Black footed Ferret
Another of the beasts that come out at night, this pretty ferret has a black mask that joins black fur on its feet, ears, and tail.
Raccoon Dog
Found in East Asia and the northern part of Vietnam and now introduced into Europe, the raccoon dog is a little bigger than a raccoon at 18 to 28 inches long.