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A nocturnal, semi-aquatic rodent.

Beavers

A nocturnal, semi-aquatic rodent.

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

Electric catfish is the common name for the catfish (order Siluriformes) family Malapteruridae. This family includes two genera, Malapterurus and Paradoxoglanis with 19 species. Several species of this family have the ability to produce an electric shock of up to 350 volts using electroplaques of an electric organ. Electric catfish are found in tropical Africa and the Nile River. Electric catfish are usually nocturnal and feed primarily on other fish, incapacitating their prey with electric discharges.

Electric Catfish

Electric catfish is the common name for the catfish (order Siluriformes) family Malapteruridae. This…

Head of the goat-sucker. It bears some resemblence to an owl, with a large head and eyes, as well as mottled plumage and nocturnal habits.

Head of a Goat-Sucker

Head of the goat-sucker. It bears some resemblence to an owl, with a large head and eyes, as well as…

The European night heron draws its name from its nocturnal habits.

European Night Heron

The European night heron draws its name from its nocturnal habits.

The kinkajou lives in S. America and spends most of its life in trees. It hunts at night for insects and fruits. It has a strong muscular tail that it uses to hold on to tree branches and it has a long tongue that it may use to gather honey.

Kinkajou

The kinkajou lives in S. America and spends most of its life in trees. It hunts at night for insects…

Nighthawks are birds of the nightjar family in the New World subfamily Chordeilinae. They are medium-sized nocturnal birds with long wings, short legs and very short bills that usually nest on the ground and catch flying insects. The Least Nighthawk, at 16 cm (6.3 inches) and 23 grams, is the smallest of all Caprimulgiformes. Nightjars are sometimes referred to as goatsuckers from the mistaken belief that they suck milk from goats (the Latin for goatsucker is Caprimulgus).

Nighthawk

Nighthawks are birds of the nightjar family in the New World subfamily Chordeilinae. They are medium-sized…

"The Noctuina form an eceedingly large group of nocturnal moths, although even here there are a few exceptional instances of day-flying species. They are distinguished by their stout bodies and narrow forewings, under which when reposing they conceal the inferior and in many cases more brightly-colored pair. The majority of the species are small and dull in their colors, while a few are among the largest of known insects." — Encyclopedia Britanica; 1893

Noctuina

"The Noctuina form an eceedingly large group of nocturnal moths, although even here there are a few…

"The Noctuina form an eceedingly large group of nocturnal moths, although even here there are a few exceptional instances of day-flying species. They are distinguished by their stout bodies and narrow forewings, under which when reposing they conceal the inferior and in many cases more brightly-colored pair. The majority of the species are small and dull in their colors, while a few are among the largest of known insects." — Encyclopedia Britanica; 1893

Noctuina

"The Noctuina form an eceedingly large group of nocturnal moths, although even here there are a few…

"The owl is one of the soberest -looking of animals", (Hooker, 1886).

Owl

"The owl is one of the soberest -looking of animals", (Hooker, 1886).

Owl, head only.

Owl

Owl, head only.

An owl, perched.

Owl

An owl, perched.

A pair of American barn-owls, one of which is grasping a small rodent in its claws.

American Barn Owl

A pair of American barn-owls, one of which is grasping a small rodent in its claws.

The barn owl is known to destroy rats and mice on farms,(Figuier, 1869).

Barn Owl

The barn owl is known to destroy rats and mice on farms,(Figuier, 1869).

The Canada owl, also known as the day or hawk owl. It feeds primarily on small birds.

Canada Owl

The Canada owl, also known as the day or hawk owl. It feeds primarily on small birds.

Eagle or great-horned owl, found in Europe and northern asia. It feeds on hares, rabbits, moles, mice, rats, partridges, and reptiles.

Eagle Owl

Eagle or great-horned owl, found in Europe and northern asia. It feeds on hares, rabbits, moles, mice,…

Head of an eagle owl. It has large eyes for seeing at night, and a hooked beak for snaring its prey.

Head of an Eagle Owl

Head of an eagle owl. It has large eyes for seeing at night, and a hooked beak for snaring its prey.

Horned owls are distinguished by two tufts or horns of feathers placed on each side of their head.

Great Horned Owl

Horned owls are distinguished by two tufts or horns of feathers placed on each side of their head.

Genus <em>ascalaphia</em>, a large owl, native to southern Europe and northern parts of Egypt.

Great Short-Eared Owl

Genus ascalaphia, a large owl, native to southern Europe and northern parts of Egypt.

"The owl is a popular name for any nocturnal, raptorial bird, of which about 200 species are known. Their classification is in a very unsettled state. Willoughby's division into two sections&ndash; one having 'ears' or 'horns,' as the tufts of feathers on their heads were called, the other destitute of such appendages&ndash; was shown to be unnatural by Geoffroy St. Hilaire. The prevailing color of the plumage is brown, with a tinge of rusty-red, and it is exceedingly loose and soft, so that their flight (even in the larger species) is almost noiseless, enabling them to swoop upon their prey, which they hunt in the twilight. All owls cast up in the form of pellets the indigestible parts of the food swallowed. These castings may be seen under any owl-roost, and show plainly the great service these birds render to man in destroying rats and mice. They range over the whole globe."&mdash;(Charles Leonard-Stuart, 1911)

Great Snow Owl

"The owl is a popular name for any nocturnal, raptorial bird, of which about 200 species are known.…

The Hawk owl is about 15 inches long and feeds on rabbits, rats, mice, reptiles and birds, (Figuier, 1869).

Hawk Owl

The Hawk owl is about 15 inches long and feeds on rabbits, rats, mice, reptiles and birds, (Figuier,…

"The owl is a popular name for any nocturnal, raptorial bird, of which about 200 species are known. Their classification is in a very unsettled state. Willoughby's division into two sections&ndash; one having 'ears' or 'horns,' as the tufts of feathers on their heads were called, the other destitute of such appendages&ndash; was shown to be unnatural by Geoffroy St. Hilaire. The prevailing color of the plumage is brown, with a tinge of rusty-red, and it is exceedingly loose and soft, so that their flight (even in the larger species) is almost noiseless, enabling them to swoop upon their prey, which they hunt in the twilight. All owls cast up in the form of pellets the indigestible parts of the food swallowed. These castings may be seen under any owl-roost, and show plainly the great service these birds render to man in destroying rats and mice. They range over the whole globe."&mdash;(Charles Leonard-Stuart, 1911)

Rock Owl

"The owl is a popular name for any nocturnal, raptorial bird, of which about 200 species are known.…

The scops-eared owl is diminutive in size, not exceeding that of the thrush, (Figuier, 1869).

Scops-Eared Owl

The scops-eared owl is diminutive in size, not exceeding that of the thrush, (Figuier, 1869).

The scops-eared owl is diminutive in size, not exceeding that of the thrush, (Figuier, 1869).

Scops-Eared Owl

The scops-eared owl is diminutive in size, not exceeding that of the thrush, (Figuier, 1869).

A scops-eared owl feeding on a small rodent. It is common in Central and Southern Europe.

Scops-Eared Owl

A scops-eared owl feeding on a small rodent. It is common in Central and Southern Europe.

A young barn-owl.

Young Barn Owl

A young barn-owl.

A nocturnal, omnivorous mammal.

Raccoon

A nocturnal, omnivorous mammal.

"Sloth is the popular name for any individual of the Edentate group Tardigrada, from their slow and awkward movements on the ground, owing to the peculiar structure of the wrist and ankle joints. The feet are armed with long claws, and turned toward the body, so that the animal is compelled to rest on the side of the hind foot, while the disproportionate length of the fore-limbs causes it to rest also on the elbows. It shuffles forward, alternately stretching the fore legs and hooking the claws into the ground, or grasping some object to draw itself along. Sloths are natives of South America, nocturnal in habit, and are found in the forests of that region, passing their lives among the branches of trees, on the leaves and young shoots of which they feed."&mdash;(Charles Leonard-Stuart, 1911)

Giant Sloth

"Sloth is the popular name for any individual of the Edentate group Tardigrada, from their slow and…

"Viscacha is a stout-built rodent, resembling a marmot, from 18 inches to two feet long, exclusive of the tail, which is from six to eight inches. Four digits on the fore and three on the hind limbs, the latter furnished with long, compressed and pointed nails; muzzle broad, and covered with a velvet-like coat of brown hair; fur mottled gray above, yellowish-white beneath; dark band on each cheek, a white band on muzzle, running back on each side almost as far as the eye. They are nocturnal, and resemble rabbits in their movements, but are less active. They are found on the pampas, from Buenos Ayres to Patagonia. These animals have the strange habit of dragging all sorts of hard and apparently useless objects to the mouth of their burrow, where bones, stones, thistle stalks, and lumps of earth may be found collected into a large heap, sufficient, according to Darwin to fill a wheel-barrow."&mdash;(Charles Leonard-Stuart, 1911)

Viscacha

"Viscacha is a stout-built rodent, resembling a marmot, from 18 inches to two feet long, exclusive of…

The European woodcock averages about thirteen inches in length, and prefers to feed on earthworms. It is primarily a nocturnal bird.

European Woodcock

The European woodcock averages about thirteen inches in length, and prefers to feed on earthworms. It…