Skulls Unlimited: World Leader in Real/Replica Skulls & Skeletons

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The class Aves includes all birds. These warm-blooded vertebrates have feathered covered bodies, give birth to egg-bound young and most have two limbs modified for flight. We offer a large selection of living and extinct bird egg replicas including many migratory and game birds.

There are over 8,700 living species of birds distributed throughout the world. Birds occupy nearly all habitats and range in size from the 2.5-inch hummingbird to the 8-foot ostrich.

Birds have lightweight bones with large airy canals. These modifications help to reduce their overall weight and aid in flight. Bird skulls have relatively large craniums, and unlike mammals, both the upper and lower jaws move when the bird opens its mouth.

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ORDERS in the Class Aves

Aepyornithiformes ( Elephant Birds )

Aepyornithiformes (Elephant Birds)
Commonly known as elephant birds, Aepyornithiformes is an extinct order of flightless birds who lived only on Madagascar. Members of Aepyornithiformes rank as the world's largest birds; some measuring over nine feet tall and weighing nearly half a ton. It was long thought that the extinction of this order was due to human hunting, however a recent archaeological study showed a lack of evidence that these birds were ever hunted by humans.

Anseriformes ( Ducks and Geese )

Goose (Aves: Anseriformes) Skull
Mostly comprised of ducks, geese, and swans, the order Anseriformes contains two families, 48 genera and some 160 species. These birds generally have broad bills, long necks, and webbed feet used in their aquatic lifestyles. They mostly feed on the water, consuming primarily fish and vegetation. Some members of the order Anseriformes, such as the mallard duck, have been domesticated for thousands of years. All Anseriformes are members of the class Aves or Birds.

Archaeopterygiformes ( Archaeopteryx )

Archaeopterygiformes (Archaeopteryx)
The Archaeopterygiformes were an order of early birds that lived during the Jurassic and possibly Cretaceous periods. They include one of the most well known and earliest birds known, Archaeopteryx. Archaeopterygiformes are distinguished from other early birds by long bony tails, and in some species, by the presence of a hyperextendible second toe.

Bird Eggs ( Bird Eggs )

American Kestrel Egg (Aves: Bird Eggs)
These realistic hand crafted replicas are a practical and legal solution to collecting and learning about North American bird eggs. These eggs are life-like, nearly indestructible and perfect for display or hands on study. Each egg has been researched and the colors matched from actual specimens. In nature, egg coloration, size and patterns vary. Due to these natural variations, some eggs may appear different from those in your region. Color, size and patterns may differ slightly from those pictured. Clear acrylic Display Stand included with each egg.

Caprimulgiformes ( Nighthawks )

Caprimulgiformes (Nighthawks)
The order Caprimulgiformes is a group of birds that includes the nighthawks, nightjars and frogmouths. Members of this order are generally insectivorous and nocturnal. They are sometimes referred to as goatsuckers from the mistaken belief that they suck milk from goats.

Cariamae ( Phororhacos )

Cariamae (Phororhacos )
Cariamae is a suggested name for a group of flightless birds that have been around for 63 million years. The group includes the families Cariamidae, Phorusrhacidae, Bathornithidae and Idiornithidae. Though traditionally considered as a suborder of the Gruiformes, based on both morphological and genetic studies that they may belong to a separate group of birds and their closet living relatives are the Falconidae, Psittaciformes and the Passeriformes.

Casuariformes ( Emus and Cassowaries )

Casuariformes (Emus and Cassowaries)
The order Casuariiformes, recently split from Struthioniformes, consists of Emus and Cassowaries. Both of these large flightless birds are native to regions of Australia and New Guinea. All Casuariiformes are members of the class Aves or Birds.

Charadriiformes ( Auks, Gulls & Puffins )

Charadriiformes (Auks, Gulls & Puffins)
The Order Charadriiformes, comprising of several hundred species, is subdivided into three suborders. The Charadrii consist of plovers, oystercatchers, snipe, and woodcock. The Lari contains gulls, and terns. The Alcae includes auks, guillemots, razorbills, and puffins. Members of this large order are found nearly everywhere, occupying many habitat types throughout the world. All Charadriiformes are members of the class Aves or Birds.

Ciconiiformes ( Storks, Ibises and Herons )

The order Ciconiiformes has 6 families, 47 genera and approximately 120 species. Members of this order, commonly referred to as herons, bitterns, egrets, spoonbills, ibis, vultures and wood storks, are generally long - necked and long - legged. This makes them well adapted for wading in relatively shallow water, even though some members of this order also feed on dry land.

Columbiformes ( Pigeons & Dodos )

Dodo (Aves: Columbiformes)
This order Columbiformes consists of 1 family, 42 genera, and over 300 species, and is comprised of pigeons and doves. These familiar birds have small heads, fleshy beaks, short necks, dense plumage, a large crop, and short legs. They all stay faithful to one mate and lay only one to two eggs. Their young are raised on a unique secretion known as "pigeon milk". Members of the order Columbiformes are the only birds that can drink by sucking up water, without needing to tilt their heads back. All Columbiformes are members of the class Aves or Birds.

Coraciiformes ( Hornbills & Allies )

The order Coraciiformes has ten families, around 41 genera, and over 200 species. Members of this order include hornbills, kingfishers, rollers, motmots and their allies. These birds are small to medium and stocky with big heads and small feet. Some species have large hornlike protrusions stemming from the bill that extend over a large portion of the skull. All species have the three joined front toes. The members of the order Coraciiformes eat vertebrates, invertebrates, and fruit.

Cuculiformes ( Cuckoos )

Cuculiformes (Cuckoos)
The Order Cuculiformes typically includes three families; Musophagidae (turacos), Cuculidae (cuckoos, anis and the roadrunner) and Opisthocomidae (the hoatzin). The taxonomy of this Order is debated and is the source of controversy depending on which author you read.

Falconiformes ( Hawks and Eagles )

The order Falconiformes contains three families, around 76 genera and over 300 species. The birds of this order have strong, curved talons, and bills with hooked tips and sharp edges. They are collectively known as raptors or birds of prey, but individually they are the hawks, eagles, kites and falcons. The members of the order Falconiformes have keen vision and are strong flyers, which makes them good hunters. They prey on snakes, invertebrates, fish, birds and mammals.

Galliformes ( Turkeys, Pheasants and Quails )

Galliformes (Turkeys, Pheasants and Quails)
This order Galliformes has four families, around 70 genera and close to 260 species. Short bills, strong legs and well developed tails are the trademarks of the birds in this order. They have short and rounded wings that are poorly adapted for sustained flight. Their feet are relatively heavy and well adapted for scratching the ground and running. They exist on seeds, leaves, fruit and buds, and some invertebrates.

Gaviiformes ( Aquatic birds )

Gaviiformes (Aquatic birds)
The order Gaviiformes consists of 5 species of birds commonly called loons. This group is known for their foot-propelled diving ability. Using their webbed feet and pointed bills, Gaviiforms can dive into the water to capture fish. This order contains a single family; Gaviidae and includes the Red-throated Loon, the Arctic Loon, the Pacific Loon, the Common Loon and the Yellow-billed Loon.

Gruiformes ( Cranes )

Gruiformes (Cranes)
The polyphyletic order Gruiformes contains a considerable number of living and extinct bird families with little in common. They are morphologically diverse and geographically widespread. Gruiform means "crane-like."

Passeriformes ( Crows & Songbirds )

Passeriformes (Crows & Songbirds)
A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: it is roughly twice as diverse as the largest of the mammal orders, the Rodentia.

Pelecaniformes ( Pelicans and Cormorants )

Pelecaniformes (Pelicans and Cormorants)
The order Pelecaniformes has 6 families, 8 genera and approximately 67 species. Birds of this order differ greatly, however all species have all four toes connected by webbing. Most have a pouch of bare skin located between the lower mandibles. The diet of members of the order Pelecaniformes consists mostly of fish however some feed on squid as well.

Phoenicopteriformes ( Flamingos )

Phoenicopteriformes (Flamingos)
The order Phoenicopteriformes, containing only one family, the flamingos, are large, long-legged wading birds with peculiar "bent" bills these bills are used to strain microorganisms from the water. They are highly social birds, foraging and breeding in large flocks. Most Phoenicopteriformes are white to pink in color. All Phoenicopteriformes are members of the class Aves or Birds.

Piciformes ( Toucans and Woodpeckers )

Piciformes (Toucans and Woodpeckers)
The order Piciformes is comprised of 6 families, around 67 genera, and over 400 species of woodpeckers and their allies. They have specialized tendons in the toes and unique leg muscles that help them forage in trees. All members of this order live in tree hollows. While known as insect feeders, some of the members of the order Piciformes eat fruit or beeswax. All Piciformes are members of the class Aves or Birds.

Procellariiformes ( Albatrosses )

Procellariiformes (Albatrosses)
The order Procellariiformes is diverse group of birds ranging from the least storm-petrel, six inches high, to the giant wandering albatross, with a wingspan close to 12 feet. The most distinguishing feature of Procellariiformes is their nostrils, which form raised tubes. The Procellariiformes produce a foul smelling oil in their stomachs which is responsible for their characteristic musty odor. All Procellariiformes are members of the class Aves or Birds.

Psittaciformes ( Macaws )

Psittaciformes (Macaws)
The order Psittaciformes has three families, around 81 genera, and over 340 species. This order is comprised of the familiar parrots from around the world. These birds, which are commonly kept as pets, have thick, hooked bills, and a fleshy tongue. They have zygodactyl feet, with two toes pointing forward and two backward,which they use to grab food objects and climb. Members of the order Psittaciformes exists on diets of fruits and nuts. All Psittaciformes are members of the class Aves or Birds.

Sphenisciformes ( Penguins )

Sphenisciformes (Penguins)
The order Sphenisciformes, consisting of a single family, the penguins, is found only in the Southern Hemisphere. Penguins are marine birds with wings that have adapted to be more flipper-like than other birds. Penguins are flightless and, therefore, have no flight feathers. All Sphenisciformes are members of the class Aves or Birds.

Strigiformes ( Owls )

Strigiformes (Owls)
The order Strigiformes, comprised solely of owls, contains 2 families and over 130 species. These nocturnal birds have hooked bill and sharp talons with a reversible outer toe. The eyes are forward facing and their hearing is acute due to their large external ear openings. Owl's diets consist of small mammals, fish, amphibians, reptiles, and birds. Members of the order Strigiformes regurgitate indigestible parts of their diet, such as bones, hair, and feathers, in the form of pellets. All Strigiformes are members of the class Aves or Birds.

Struthioniformes ( Ostriches and Kiwis )

Ostrich (Aves: Struthioniformes) Skull
The Ostrich, Struthio camelus, is a large flightless bird native to Africa (and formerly the Middle East). It is the only living species of its family, Struthionidae and its genus, Struthio. Ostriches share the order Struthioniformes with the Emu, kiwis, and other ratites. It is distinctive in its appearance, with a long neck and legs and the ability to run at maximum speeds of about 45mph (72km/h, the top land speed of any bird).

Trochiliformes ( Hummingbird )

Hummingbird (Aves: Trochiliformes) Skull
Hummingbirds are birds in the family Trochilidae, and are native to the Americas. They are among the smallest of birds, and include the smallest extant bird species, the Bee Hummingbirds. They can hover in mid-air by rapidly flapping their wings 12-90 times per second (depending on the species). They can also fly backwards, and are the only group of birds able to do so. Their English name derives from the characteristic hum made by their rapid wing beats. They can fly at speeds exceeding 15 m/s (54 km/h; 34 mph).