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Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
- Skeleton
Bird anatomy, or the physiological structure of birds'...
- Ornithurae
Ornithurae (meaning "bird tails" in Greek) is a natural...
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- Passeriformes
A passerine (/ ˈ p æ s ə r aɪ n /) is any bird of the order...
- Bee Hummingbird
Description. The bee hummingbird is the smallest living...
- Avifauna (Disambiguation)
Vogelpark Avifauna, a bird park in Alphen aan den Rijn,...
- Red-Crested Turaco
It is a frugivorous bird endemic to western Angola. Its call...
- Ichthyornis
Ichthyornis (meaning "fish bird", after its fish-like...
- Apterygiformes
Kiwi (/ ˈ k iː w iː / KEE-wee) are flightless birds endemic...
- Ornithothoraces
Ornithothoraces is a group of avialan dinosaurs that...
- Skeleton
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- Bird Colours
- Flight
- Digestion
- Reproduction
- Communication
- Evolution and Taxonomy
- Birds and People
- Bird Orders
- Bird Population Decreasing
Birds come in many different colours. These colours can be useful to a bird in two ways. Camouflage help to hide birds from predators. Brighter colours can also be useful to birds. They can be used to identify the bird to others of the same species. Male bird are often brightly coloured while the female is camouflaged. The logic is as follows: the ...
Most birds can fly, and if they do, then the ability is inherited, not learnt.They fly by pushing through the air with their wings. The curved surfaces of the wings cause air currents (wind) which lift the bird. Flapping keeps the air current moving to create lift and also moves the bird forward. Some birds can glide on air currents without flappin...
Modern birds do not have teeth, and many swallow their prey whole. Nevertheless, they must break up food before it is digested. First of all, along their throat (oesophagus) they have a crop. This stores food items before digestion. That way a bird can eat several items, and then fly off to a quiet spot to digest them. Their stomach comes next, wit...
Mating
Although birds are warm-blooded creatures like mammals, they do not give birth to live young. They lay eggsas reptiles do, but the shell of a bird's egg is hard. The baby bird grows inside the egg, and after a few weeks hatches (breaks out of the egg). Birds in cold climates usually have a breeding season once a year in the spring. Migratory birds can have two springs and two mating seasons in a year. Ninety-five per cent of bird species are socially monogamous. These birds pair for at least...
Nesting
Once the birds have found partners, they find a suitable place to lay eggs. The idea of what is a suitable place differs between species, but most build bird nests. The bird is driven by a hormone (estradiol E2) to prepare a place for the eggs to hatch.Birds' nests may be up a tree, in a cliff or on the ground according to species. When filled with eggs they are almost always guarded by one of the pair. In fact it is virtually impossible for the eggs to survive if one of the parents dies. Rob...
Hatching
Once the hen has mated, she produces fertile eggs which have chicks growing inside them. She lays the eggs in the nest. There might be just one egg or a number of them, called a clutch. Emusmight lay as many as fifteen huge dark green eggs in a clutch. After the eggs are laid, they are incubated, or kept warm so the chicks form inside. Most birds stay together for the whole nesting season, and one advantage is that the work is shared. Many birds take turns sitting on the eggs, so that each ad...
Most birds are social animals, at least part of the time. They communicate to each other using sounds and displays. Almost all birds make sounds to communicate. The types of noises that vary greatly. Some birds can sing, and they are called songbirds or passerines. Examples are robins, larks, canaries, thrushes, nightingales. Corvids are passerines...
Palaeontologists have found some exceptional places (lagerstätten) where fossils of early birds are found. The preservation is so good that on the best examples impressions of their feathers can be seen, and sometimes even the remains of meals they have eaten. From these remains we know that birds evolved from small carnivorous dinosaurs (theropods...
The African grey parrotis a renowned talker.Blue-winged teal ducksused to be shot for sport.In many countries storksare thought to bring good luck.The following is a listing of all bird orders: 1. Infraclass Palaeognathae 1.1. Superorder Struthionimorphae 1.1.1. Struthioniformes 1.2. Superorder Notopalaeognathae 1.2.1. Rheiformes 1.2.2. Tinamiformes 1.2.3. Casuariiformes 1.2.4. Apterygiformes 2. Infraclass Neognathae 2.1. Superorder Galloanserae 2.1.1. Galliformes 2.1.2. Anseriformes 2.2. Sup...
A report produced by BirdLife International every five years measures the population of birds worldwide. One in every eight types of birds is now "in decline".
List of birds. Penguins. Ostriches. This article lists living orders and families of birds. The links below should then lead to family accounts and hence to individual species. The passerines (perching birds) alone account for well over 5,000 species. In total there are about 10,000 species of birds described worldwide, though one estimate of ...
A comprehensive listing of all the bird species confirmed in the United States follows. It includes species from all 50 states and the District of Columbia as of July 2022. Species confirmed in other U.S. territories are also included with other "as of" dates.
In this list of birds by common name, a total of 10,976 extant and recently extinct (since 1500) bird species are recognised. Species marked with a "†" are extinct.
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The present scientific consensus is that birds are a group of maniraptoran theropod dinosaurs that originated during the Mesozoic Era . A close relationship between birds and dinosaurs was first proposed in the nineteenth century after the discovery of the primitive bird Archaeopteryx in Germany.
For other uses, see Hummingbird (disambiguation). Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With approximately 366 species and 113 genera, [1] they occur from Alaska to Tierra del Fuego, but most species are found in Central and South America. [2] .
