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Spiders come in many shapes and sizes. Some are poisonous, while others are not.

Spider

Spiders come in many shapes and sizes. Some are poisonous, while others are not.

The sea spiders are inhabitants of the sea, and they are very often referred to as crustaceans.

Sea-Spider

The sea spiders are inhabitants of the sea, and they are very often referred to as crustaceans.

The mites form with the ticks the order Acarina, and are distinguished by the fact that the abdomen is amalgamated with the cephalothorax to form a single mass.

Mite

The mites form with the ticks the order Acarina, and are distinguished by the fact that the abdomen…

The mites form with the ticks the order Acarina, and are distinguished by the fact that the abdomen is amalgamated with the cephalothorax to form a single mass.

Mite

The mites form with the ticks the order Acarina, and are distinguished by the fact that the abdomen…

Spiders are distinct from insects by having four pairs of legs.

Spider

Spiders are distinct from insects by having four pairs of legs.

Close view of a spiders foot.

Spider Foot

Close view of a spiders foot.

Usually living around small mountain streams, large spiders have been known to attack and eat the vrested pardalotte, which averages only three inches in length.

Crested Pardalotte

Usually living around small mountain streams, large spiders have been known to attack and eat the vrested…

The bluebird feeds on a diet of insects and spiders in the summer and berries in the winter. It usually makes its nest in the hollow limb of a tree or on the rail of a fence.

Bluebird

The bluebird feeds on a diet of insects and spiders in the summer and berries in the winter. It usually…

"Some, of which the Common Garden Spider, <em>Epeira diadema</em> is an excellent example, construct a beautiful net, composed of stout radiating lines, intersected at tolerably regular intervals by circular filaments." &mdash; Goodrich, 1859

Garden-spiders

"Some, of which the Common Garden Spider, Epeira diadema is an excellent example, construct…

"Some spiders, like the <em>Ctenizae</em>, close the mouth of their subterranean resdence with a most ingeniously-constructed trap-door, which the inhabitant closes with the utmost pertinacity when any attempt is made to invade the privacy of his domicile. Hence these, of which several species are found in the south of Europe and on the shores of the Mediterranean, are generally known as <em>Trap-door spiders</em>." &mdash; Goodrich, 1859

Garden-spider and trap-door spider

"Some spiders, like the Ctenizae, close the mouth of their subterranean resdence with a most…

"The most remarkable organs perceptable on the abdomen of the spiders are the <em>spinnerets</em>, by means of which they spin their curious and often beautiful webs, which have attracted the attention and excited the admitation of mankind in all ages. These spinnerets are little teat-like organs, placed close to the extremity of the abdomen, on its lower surface." &mdash; Goodrich, 1859

Spinnerets of a spider

"The most remarkable organs perceptable on the abdomen of the spiders are the spinnerets, by…

"The spiders with which we in temperate climates are most acquainted are of small size, but in hot regions there are several species whose extended legs occupy a circle of six or seven inches in diameter. Some of these, belonging to the genus <em>Mygale</em>, found in South America and Mexico, are said to attack young humming-birds, and to climb trees for this purpose." &mdash; Goodrich, 1859

Mygale

"The spiders with which we in temperate climates are most acquainted are of small size, but in hot regions…

A spider in a web

Spider

A spider in a web

A spider's web or net.

Cobweb

A spider's web or net.

Two spiders

Spiders

Two spiders

A spider's web.

Cobweb

A spider's web.

The name of an extensive genus of insects, native to the warm climates of both hemispheres, and belonging to the same family as the spiders.

Scorpion

The name of an extensive genus of insects, native to the warm climates of both hemispheres, and belonging…

An extensive division of insects, which includes the scorpions and mites. The spiders differ from most insects in that the body consists of only two segments instead of three, the head and chest being united to form one segment.

Spider

An extensive division of insects, which includes the scorpions and mites. The spiders differ from most…

A family of spiders on a web with one caught in it.

Spider Web

A family of spiders on a web with one caught in it.

"A genus of spiders, the type of a family called Epeirdae. They are of those spiders which have only a pair of pulmonary sacs and spiracles; construct webs with regular meshes, formed by concentric circles and straight radii; and are furnished with a pair of almost contiguous eyes on each side; other four eyes forming a quadrangle in the center." &mdash; Chambers, 1881

Epeira Diadema

"A genus of spiders, the type of a family called Epeirdae. They are of those spiders which have only…

"Entosternum of one of the mygalomorphous spiders; ventral surface. Ph.N., pharyngeal notch. The posterior median process with its repetition of triangular segments closely resembles the same process in Limulus." &mdash; The Encyclopedia Britannica, 1910

Entosternum

"Entosternum of one of the mygalomorphous spiders; ventral surface. Ph.N., pharyngeal notch. The posterior…

"Liphistius desultor. Lateral view. I to VI, Appendages of the prosoma cut off at the base. o, Ocular tubercle. praegen, The prae-genital somite. 1 and 2, Sternites of the first and second opisthosomatic somites. 3 and 4, Appendages of the third and fourth opisthosomatic somites, which are the spinning organs, and in this genus occupy their primitive position instead of migrating to the anal region as in other spiders. 5, Tergite of the fifth opisthosomatic somite. II, Eleventh opisthosomatic somite; an, Anus." &mdash; The Encyclopedia Britannica, 1910

Liphistius Desultor

"Liphistius desultor. Lateral view. I to VI, Appendages of the prosoma cut off at the base. o, Ocular…

A decorative divider with birds, plants, and spiders.

Nature Divider

A decorative divider with birds, plants, and spiders.

This species is known as the Sea-spiders or Scorpion-shells.

Pteroceras Scorpio (Linnaeus)

This species is known as the Sea-spiders or Scorpion-shells.

This species is known as the Sea-spiders or Scorpion-shells.

Pteroceras Millepeda (Linnaeus)

This species is known as the Sea-spiders or Scorpion-shells.

This species is known as the Sea-spiders or Scorpion-shells.

Pteroceras Chiragra (Linnaeus)

This species is known as the Sea-spiders or Scorpion-shells.

This species is known as the Sea-spiders or Scorpion-shells.

Pteroceras Lambis (Linnaeus)

This species is known as the Sea-spiders or Scorpion-shells.

"The Wall-Gecko ... clambers about the walls catching spiders, on which it feeds."

Wall-Gecko

"The Wall-Gecko ... clambers about the walls catching spiders, on which it feeds."

"By means of its disguise, it can approach little animals which become its prey, such as flies, spiders and small bugs."

Pupa of Reduvious Personatus, Covered with its Cloak of Dust

"By means of its disguise, it can approach little animals which become its prey, such as flies, spiders…

"By means of its disguise, it can approach little animals which become its prey, such as flies, spiders and small bugs."

Pupa of Reduvious Personatus, Denuded of its Cloak of Dust

"By means of its disguise, it can approach little animals which become its prey, such as flies, spiders…

The garden spider is a very common orb-weaver that creates spiral webs in gardens, fields, and forests.

Garden Spider

The garden spider is a very common orb-weaver that creates spiral webs in gardens, fields, and forests.

An illustration of an adult horseshoe crab from the dorsal aspect. The horseshoe crab or Atlantic horseshoe crab (Limulus polyphemus) is a marine chelicerate arthropod. Despite its name, it is more closely related to spiders, ticks, and scorpions than to crabs. Horseshoe crabs are most commonly found in the Gulf of Mexico and along the northern Atlantic coast of North America. A main area of annual migration is the Delaware Bay, although stray individuals are occasionally found in Europe.

Horseshoe Crab (Adult)

An illustration of an adult horseshoe crab from the dorsal aspect. The horseshoe crab or Atlantic horseshoe…

An illustration of a young horseshoe crab from the dorsal aspect. The horseshoe crab or Atlantic horseshoe crab (Limulus polyphemus) is a marine chelicerate arthropod. Despite its name, it is more closely related to spiders, ticks, and scorpions than to crabs. Horseshoe crabs are most commonly found in the Gulf of Mexico and along the northern Atlantic coast of North America. A main area of annual migration is the Delaware Bay, although stray individuals are occasionally found in Europe.

Horseshoe Crab (Young)

An illustration of a young horseshoe crab from the dorsal aspect. The horseshoe crab or Atlantic horseshoe…

Darkling beetles (also known as Darkening beetles) are a family of beetles found worldwide, estimated at more than 20,000 species. Many of the beetles have black elytra. Darkling beetles eat both fresh and decaying vegetation. Major predators include birds, rodents, sun spiders, and lizards.

Darkling Beetle

Darkling beetles (also known as Darkening beetles) are a family of beetles found worldwide, estimated…

The Tarantula Wolf Spider (Lycosa tarantula) is an arachnid in the Lycosidae family of wolf spiders. f, falces.

Tarantula Wolf Spider

The Tarantula Wolf Spider (Lycosa tarantula) is an arachnid in the Lycosidae family of wolf spiders.…

An illustration of a small and large spider.

Spiders

An illustration of a small and large spider.

"Cats purr, dogs bark, cocks crow, a cow lows, a donkey brays, an eagle screams, parrots talk, spiders tick, mankind laugh and cry." -Trowbridge, 1866

Animal Rebus

"Cats purr, dogs bark, cocks crow, a cow lows, a donkey brays, an eagle screams, parrots talk, spiders…

Spiders (order Araneae) are air-breathing chelicerate arthropods. Trapdoor spiders, of family Ctenizidae, are medium-sized mygalomorph spiders that construct burrows with a cork-like trapdoor made of soil, vegetation and silk. The Trapdoor Spider is difficult to see when it is closed because the plant and soil materials effectively camouflage it. The trapdoor is hinged on one side with silk. The spiders, which are usually nocturnal, typically wait for prey while holding onto the underside of the door with the claws on their tarsi. Prey is captured when insects, other arthropods, or small vertebrates venture too close to the half-open trapdoor at night. The spider detects the prey by vibrations and when it comes close enough, the spider leaps out of its burrow and captures it.

Trapdoor Spider

Spiders (order Araneae) are air-breathing chelicerate arthropods. Trapdoor spiders, of family Ctenizidae,…

The field sparrow is smaller than the song sparrow and is very shy. It likes to eat spiders, ants, and earthworms.

Field Sparrow

The field sparrow is smaller than the song sparrow and is very shy. It likes to eat spiders, ants, and…

A species of Phrynus, actual size. The species resembles spiders with long feelers and great claws.

Phrynidae

A species of Phrynus, actual size. The species resembles spiders with long feelers and great claws.

<i>Chalybion caeruleum</i>. "A family of fossorial hymenopters, or digger wasps. The prothorax is narrowed anteriorly, and forms a sort of neck; the basal segment of the abdomen is narrowed into a long, smooth, round petiole; and the head and thorax are usually clothed with a long, thin pubescence. These wasps usually burrow into sand-banks, and provision their cells with caterpillars and spiders." &mdash;Whitney, 1889

Spider Huntress Wasp

Chalybion caeruleum. "A family of fossorial hymenopters, or digger wasps. The prothorax is narrowed…

<i>Latrodectus mactans</i>. Spiders are "dimerosomatous - that is, have the body divided into two principal regions, the cephalothorax, or head and chest together, and the abdomen, which is generally tumid or globose...In those species which are poisonous the falces are traversed by the duct of a venom-gland." &mdash;Whitney, 1889

Female Black Widow Spider with a View of the Under Side of the Abdomen

Latrodectus mactans. Spiders are "dimerosomatous - that is, have the body divided into two principal…

<i>Arachnothera magna</i>. Also called a spider-catcher, the Streaked Spiderhunter is "a bird that catches spiders...They are small creeper-like birds with long bills, and belong to the family <i>Nectariniidae</i>." &mdash;Whitney, 1889 <p>A bird with a long, pointed, thin beak, sitting on a branch.

Streaked Spiderhunter

Arachnothera magna. Also called a spider-catcher, the Streaked Spiderhunter is "a bird that catches…