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"The external air penetrates into every part of their body by the respiratory tubes, which ramify the whole cellular tissue. Wings alone would fail to support the bird."

Skeleton of the Swan

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the…

"Besides flight, birds possess other means of locomotion, being formed for walking, swimming or flying, according as their habits are aerial, terrestrial or aquatic."

Wing of a Penguin

"Besides flight, birds possess other means of locomotion, being formed for walking, swimming or flying,…

The ruby-throated hummingbird (Archilochus colubris) is a bird with a long beak and rapid wings. This species is known for the red color upon its neck.

Ruby-Throated Hummingbird

The ruby-throated hummingbird (Archilochus colubris) is a bird with a long beak and rapid wings. This…

An illustration of a dog running around a corner and a pan flying in the air.

Running Dog

An illustration of a dog running around a corner and a pan flying in the air.

The car in which the aeronauts sit is usually made of wicker-work of whalebone. It is sustained by cords attached to a network covering the entire upper half of the balloon.

Balloon with Car and Parachute

The car in which the aeronauts sit is usually made of wicker-work of whalebone. It is sustained by cords…

Generally, sparrows tend to be small, plump brown-grey birds with short tails and stubby yet powerful beaks.

Sparrow

Generally, sparrows tend to be small, plump brown-grey birds with short tails and stubby yet powerful…

A border of the coast with a pier, sailboat and some seagulls flying overhead.

Coast

A border of the coast with a pier, sailboat and some seagulls flying overhead.

The Alamo, originally known as Mission San Antonio de Valero, is a former Roman Catholic mission and fortress compound, now a museum in San Antonio, Texas located at 30 Alamo Plaza. The compound which originally comprised a santuary and surrounding buildings, was built by the Spanish Empire in the 18tth century for education of local Native Americans after their conversion to Christianity. In 1793, the mission was secularized and soon abandoned. Ten years later, it became a fortress housing the Mexican Army group the Second Flying Company of San Carlos de Parras. Mesican soldiers held the mission until December 1835, when General Matrin Perfecto de Cos surrendered it to the Texian Army following the siege of Bexar. A relatively small number of Texian soldiers then occupied the compound. Texian General Sam Houston believed the Texians did not have the manpower to hold the fort and ordered Colonel James Bowie to destroy it. Bowie chose to disregard those orders and instead worked with Colonel James C. Neill to fortify the mission. On February 23, Mexican General Antonio Lopez de Santa Anna led a large force of Mexican soldiers into San Antonio de Bexar and promptly initiated a siege. The siege ended on March 6, when the Mexican army attacked the Alamo; by the end of the Battle of the Alamo all or almost all of the defenders were killed. When the Mexican army retreated from Texas at the end of the Texas Revolution, they tore down many of the Alamo walls and burned some of the building

The Alamo

The Alamo, originally known as Mission San Antonio de Valero, is a former Roman Catholic mission and…

An illustration of a man on one knee preparing to shoot a geese that is flying overhead.

Geese Hunting

An illustration of a man on one knee preparing to shoot a geese that is flying overhead.

The Black-and-white Warbler, Mniotilta varia, is a small New World warbler. It breeds in northern and eastern North America from southern Canada to Florida. This species is migratory, wintering in Florida, Central America and the West Indies down to Peru. This species is a very rare vagrant to western Europe, mainly to Ireland and Great Britain. This species is 13 cm long and weighs 11 g. The summer male Black-and-white Warbler is boldly streaked in black and white, and the bird has been described as a flying humbug. There are two white wing bars. Female and juvenile plumages are similar, but duller and less streaked.

Black and White Warbler

The Black-and-white Warbler, Mniotilta varia, is a small New World warbler. It breeds in northern and…

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…

They are generally quite robust, and consist of many strong flying forms with relatively long and narrow wings. Another common name for some members of this group, and indeed a few species from other families, is Mastiff Bat.

Head of Mastiff Bat

They are generally quite robust, and consist of many strong flying forms with relatively long and narrow…

Gothic architecture is a style of architecture which flourished during the high and late medieval period. It evolved from Romanesque architecture and was succeeded by Renaissance architecture. Its characteristic features include the pointed arch, the ribbed vault and the flying buttress.

Gothic Style Window

Gothic architecture is a style of architecture which flourished during the high and late medieval period.…

Draco volans, or the Flying Dragon, is a member of the genus of gliding lizards Draco. It can spread out folds of skin attached to its movable ribs to form "wings" that it uses to glide from tree to tree over distances upwards of 8 meters (25 feet); however, like all modern reptiles, it lacks the ability to sustain powered flight, and is capable only of gliding. Its wings are brightly colored with orange, red and blue spots and stripes, and they provide camouflage when folded. The flying dragon can reach lengths as long as 19 - 23 cm. It feeds on arboreal ants and termites.

Flying Dragon

Draco volans, or the Flying Dragon, is a member of the genus of gliding lizards Draco. It can spread…

The winged female woolly aphid (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

Adult Woolly Aphid

The winged female woolly aphid (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

The Smoky Flying Squirrel (Pteromyscus pulverulentus) is a species of rodent in the Squirrel (Sciuridae) family.

Smoky Flying Squirrel

The Smoky Flying Squirrel (Pteromyscus pulverulentus) is a species of rodent in the Squirrel (Sciuridae)…

"Semiotellus chalcidiphagus. a, female, from side." -Whitney, 1911

Wasp

"Semiotellus chalcidiphagus. a, female, from side." -Whitney, 1911

"Semiotellus chalcidiphagus. a, male, from above." -Whitney, 1911

Wasp

"Semiotellus chalcidiphagus. a, male, from above." -Whitney, 1911

A flying buttress, or arc-boutant, is a specific type of buttress usually found on a religious building such as a cathedral. They are used to transmit the horizontal thrust of a vault across an intervening space (which might be an aisle, chapel or cloister), to a buttress outside the building. The employment of the flying buttress means that the load bearing walls can contain cut-outs, such as for large windows, that would otherwise seriously weaken them. Flying buttresses are often found in Gothic architecture.

Early Gothic Flying Buttress

A flying buttress, or arc-boutant, is a specific type of buttress usually found on a religious building…

The Common Glowworm (Lampyris noctiluca) is a species of beetle in the Lampyridae family of fireflies.

Common Glowworm

The Common Glowworm (Lampyris noctiluca) is a species of beetle in the Lampyridae family of fireflies.

"All aboard for the balloon-fish ascension!"

Balloon Fish Ride

"All aboard for the balloon-fish ascension!"

A flock of birds flying across a backdrop of flowers and an hour-glass.

Header, Footer

A flock of birds flying across a backdrop of flowers and an hour-glass.

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry.

Sheep Bot Fly

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as…

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry.

Sheep Bot Fly

The adult Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as…

The Alderfly (Sialis infumata) is an insect in the Megaloptera order of alderflies, dobsonflies, and fishflies.

Alderfly

The Alderfly (Sialis infumata) is an insect in the Megaloptera order of alderflies, dobsonflies, and…

"A and B...are two corks, into each of which r inserted four wing feathers from any bird, so as to be slightly inclined like the sails of a windmill, but in opposite directions in each set. A round shaft is fixed in the cork a, which ends in a sharp point. At the upper part of the cork b is fixed a whalebone bow, having a small pivot hole in its centre to receive the point of the shaft. The bow is then to be strung equally on each side to the upper portion of the shaft, and the little machine is completed. Wind up the string by turning the flyers different ways, so that the spring of the bow may unwind them with their anterior edges ascending." -Britannica, 1910

Cayley's Flying Model

"A and B...are two corks, into each of which r inserted four wing feathers from any bird, so as to be…

An illustration of Penaud's artificial flying bird. "a b c d, a', b' c' d', lactic wings which twist and untwist when made to vibrate; a b, a' b', Anterior margins of wings; c d, c' d', Posterior margins of wings; c, c' Inner portions of wings attached to central of model by elastic bands at e' f, India-rubber in a state of torsion, which provides the motive power, by causing the crank situated between the vertical wing supports (g) to rotate; as the crank revolves the wing are made to vibrate by means of two rods which extend between the crank and the roots of the wings; h, tail of artificial bird." -Britannica, 1910

Penaud's Artificial Flying Bird

An illustration of Penaud's artificial flying bird. "a b c d, a', b' c' d', lactic wings which twist…

An illustration of Langley's flying machine. A, Large airplane; b, small airplane; c, propelling screws.

Langley's Flying Machine

An illustration of Langley's flying machine. A, Large airplane; b, small airplane; c, propelling screws.

An illustration of Sir H. Maxim's Flying Machine.

Sir H. Maxim's Flying Machine

An illustration of Sir H. Maxim's Flying Machine.

An illustration of Santos Dumont's flying machine.

Santos Dumont's Flying Machine

An illustration of Santos Dumont's flying machine.

A representation of an Assyrian griffin that adorned their buildings prior to the Persian conquest.

Sculptured Griffin from the Sculptures in the Ruins of Nineveh

A representation of an Assyrian griffin that adorned their buildings prior to the Persian conquest.

Flying Eagle shown from nature.

Flying Eagle

Flying Eagle shown from nature.

This Flying Grotesque pilaster is a squatting winged female without arms. It is found in a palace in Siena, Italy during the Italian Renaissance.

Flying Grotesque Pilaster

This Flying Grotesque pilaster is a squatting winged female without arms. It is found in a palace in…

The Imperial Moth (Eacles imperialis) is an insect in the Saturniidae family of large and colorful moths.

Imperial Moth

The Imperial Moth (Eacles imperialis) is an insect in the Saturniidae family of large and colorful moths.

Edema albifrons is a species of moth of the Bombycidae family.

Edema

Edema albifrons is a species of moth of the Bombycidae family.

Elachertus cacoeciae is a species of Chalcid wasp of the Hymenoptera order.

Chalcid Wasp

Elachertus cacoeciae is a species of Chalcid wasp of the Hymenoptera order.

The Egyptian Free-Tailed Bat (Tadarida aegyptiaca) is a species of bat in the Molossidae family of free-tailed bats.

Egyptian Free-Tailed Bat

The Egyptian Free-Tailed Bat (Tadarida aegyptiaca) is a species of bat in the Molossidae family of free-tailed…

Elis quadrinotata is a species of wasp in the Scoliidae family.

Scoliid Wasp

Elis quadrinotata is a species of wasp in the Scoliidae family.

The Northern Ghost Bat (Diclidurus albus) is a species of bat belonging to the Emballonuridae family of sheathtailed bats.

Northern Ghost Bat

The Northern Ghost Bat (Diclidurus albus) is a species of bat belonging to the Emballonuridae family…

Embolimus americanus is a species of wasp belonging to the Proctotrupoidea superfamily of various wasps.

Embolimus Wasp

Embolimus americanus is a species of wasp belonging to the Proctotrupoidea superfamily of various wasps.

Encyrtus cecidomyiae is a species of wasp in the Encyrtidae family of parasitic wasps.

Parasitic Wasp

Encyrtus cecidomyiae is a species of wasp in the Encyrtidae family of parasitic wasps.

Chrysocharis imbrasus is an insect in the Chalcidoidea family of Chalcid wasps.

Chalcid Wasp

Chrysocharis imbrasus is an insect in the Chalcidoidea family of Chalcid wasps.

Efferia aestuans (or Erax bastardi) is an insect in the Asilidae family of robber flies.

Robber Fly

Efferia aestuans (or Erax bastardi) is an insect in the Asilidae family of robber flies.

The Milkweed Tiger Moth (Euchaetes egle) is an insect in the Arctiidae family of tiger moths.

Milkweed Tiger Moth

The Milkweed Tiger Moth (Euchaetes egle) is an insect in the Arctiidae family of tiger moths.

"Female Moth of Gooseberry-spanworm (Eufitchia ribearia)." -Whitney, 1911

Gooseberry Spanworm

"Female Moth of Gooseberry-spanworm (Eufitchia ribearia)." -Whitney, 1911

Eumenes fraterna is a species of potter wasps in the Vespidae family of wasps.

Potter Wasp

Eumenes fraterna is a species of potter wasps in the Vespidae family of wasps.

Eupelmus floridanus is a species of Chalcid wasp, a parasitic insect in the Eupelmidae family.

Chalcid Wasp

Eupelmus floridanus is a species of Chalcid wasp, a parasitic insect in the Eupelmidae family.

The Garden Tiger Moth (Arctia caja) is a species of tiger moths that are also known by the synonym Euprepia caja.

Garden Tiger Moth

The Garden Tiger Moth (Arctia caja) is a species of tiger moths that are also known by the synonym Euprepia…

The dorsal view of the Ensign Wasp (Evania laevigata), an insect in the Evaniidae family.

Dorsal View of Ensign Wasp

The dorsal view of the Ensign Wasp (Evania laevigata), an insect in the Evaniidae family.

The Yellow-Tailed Tachina Fly (Belvosia unifasciata) is an insect in the Tachinidae family and is also known as the synonym Exorista flavicauda.

Yellow-Tailed Tachina Fly

The Yellow-Tailed Tachina Fly (Belvosia unifasciata) is an insect in the Tachinidae family and is also…

An illustration of a man riding a flying horse and following flying dogs.

Flying Horse and Dogs

An illustration of a man riding a flying horse and following flying dogs.

An illustration of a man riding a horse being chased by flying snakes.

Man Chased on a Horse

An illustration of a man riding a horse being chased by flying snakes.

The California Flying Fish (Cheilopogon pinnatibarbatus californicus) is the largest species in the Exocoetidae family of flying fish.

California Flying Fish

The California Flying Fish (Cheilopogon pinnatibarbatus californicus) is the largest species in the…

The American Flying Squirrel (Sciuropterus volucella) is a small rodent in the Sciuridae family of squirrels.

American Flying Squirrel

The American Flying Squirrel (Sciuropterus volucella) is a small rodent in the Sciuridae family of squirrels.

The flying frog is an amphibian "having enormously long webbed toes, enabling it to sustain a kind of flight." -Whitney, 1911

Flying Frog

The flying frog is an amphibian "having enormously long webbed toes, enabling it to sustain a kind of…

The image shows a fruit bat, a bat from the Pteropodidae family of megabats.

Fruit Bat Hanging from Tree

The image shows a fruit bat, a bat from the Pteropodidae family of megabats.

The Thumbless Bat (Furipterus horrens) is a bat in the Furipteridae family of the smokey and thumbless bats. This species was once known as the synonym Furia horrens.

Thumbless Bat

The Thumbless Bat (Furipterus horrens) is a bat in the Furipteridae family of the smokey and thumbless…

"On the Sarcorhamphus gryphus the Condor, the head and neck are bare, with dull red skin, wrinkled in folds on the latter; while an oblique ruff of white down surmounts the black plumage, which shews white edges to the wing-coverts and secondaries. The male has a fleshy crest extending from the mid-cere to the crown, a large wattle on the throat, and a small caruncle below; the irides being in the sex brown, in the female garnet red. The bill is white with brown base." A. H. Evans, 1900

Condor

"On the Sarcorhamphus gryphus the Condor, the head and neck are bare, with dull red skin, wrinkled in…

An illustration of four birds flying around a branch of a tree.

Birds Flying Around Tree

An illustration of four birds flying around a branch of a tree.

"The coloration of the twenty or more species of Cypselus is sooty-black or mouse-brown, frequently exhibiting a metallic gloss, while the collar, rump, abdomen, or edges of the feathers may be white. A forked tail is not uncommon. The common Swift, or Deviling of Britain, is found through Europe, North Africa, and Asia, southwards t the Himalayas, migrating to South Africa, Madagascar, and Southern Asia." A. H. Evans, 1900

Common Swift Flying Through the Air by a Structure and a Tree with its Mouth Open

"The coloration of the twenty or more species of Cypselus is sooty-black or mouse-brown, frequently…