Welcome to the Birds Portal! Birds
) are bipedal
, oviparous vertebrate animals
. Most scientists believe that birds evolved
from theropod dinosaurs
. Ranging in size from tiny hummingbirds
to the huge Ostrich
, there are between 9,000 and 10,000 known living bird species in the world, making Aves
the most diverse class of terrestrial vertebrate
A bird is characterized by feathers, a toothless beak, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a light but strong skeleton. All birds have forelimbs modified as wings and most can fly.
Birds are important sources of food, acquired either through farming or hunting. Numerous species of birds are also used commercially, and some species, particularly songbirds and parrots, are popular pets. Birds figure prominently in all aspects of human culture from religion to poetry and popular music. Numerous species of birds are threatened with extinction by human activities and as a result efforts are underway to protect them.
that have adapted
to life within the marine
environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution
, as the same environmental problems and feeding niches
have resulted in similar adaptations. The first seabirds evolved in the Cretaceous period
, and modern seabird families emerged in the Paleogene
In general, seabirds live longer, breed later and have fewer young than other birds do, but they invest a great deal of time in their young. Most species nest in colonies, which can vary in size from a few dozen birds to millions. Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases. They feed both at the ocean's surface and below it, and even feed on each other. Seabirds can be highly pelagic, coastal, or in some cases spend a part of the year away from the sea entirely.
Seabirds and humans have a long history together: they have provided food to hunters, guided fishermen to fishing stocks and led sailors to land. Many species are currently threatened by human activities, and conservation efforts are under way.
||Does wisdom perhaps appear on the earth as a raven which is inspired by the smell of carrion?
Free online resources:
- SORA: The Searchable Online Research Archive (SORA) has decades worth of archives of the following journals: The Auk, Condor, Journal of Field Ornithology, North American Bird Bander, Studies in Avian Biology, Pacific Coast Avifauna, and the Wilson Bulletin. Coverage ends around 2000. The ability to search all journals or browse exists on the front page.
- Notornis: The Journal of the Ornithological Society of New Zealand covers New Zealand and the South Pacific.
- New Zealand Journal of Ecology: This journal often publishes bird-related articles. Like Notornis, this journal is concerned with New Zealand and surrounding areas.
- Marine Ornithology: Published by the numerous Seabird Research Groups, Marine Ornithology is specific and goes back many years.
- BirdLife International: The Data Zone has species accounts for every species, although threatened species and some key groups have greater detail with others only having status and evaluation.
- Authors Names: This is a good source for binomial authorities for taxoboxes.
There is also Birds of North America, Cornell University's massive project collecting information on every breeding bird in the ABA area. It is available for 40 USD a year.
For more sources, including printed sources, see WikiProject Birds.
The California Condor
, Gymnogyps californianus
, is a species
of North American bird
in the New World vulture
. Currently, this condor
inhabits only the western coastal mountains of the United States
, Baja California
, and the Grand Canyon
. It is the only surviving member of the genus Gymnogyps
, though fossil members are known
.It is a large, black vulture with patches of white on the underside of the wings and a largely bald head with skin color ranging from yellowish to a glowing red, depending on the bird’s mood. It has the largest wingspan of any bird found in North America
and is one of the heaviest. The condor is a scavenger
and eats large amounts of carrion
. Condor numbers dramatically declined in the 1800s
. A conservation plan was put in place by the United States government that led to the capture of all the remaining wild condors in 1987. Beginning in 1991, condors have been reintroduced into the wild. The California Condor is one of the world's rarest bird
species. As of 2005, there were only 273 individuals including 127 in the wild.
Collaboration of the month
Every month a different bird-related topic, article, stub or non-existent article is picked. Please improve the article any way you can.
|Class Aves, divided into superorders, orders, suborders (where indicated), and families.
The following Wikimedia
sister projects provide more on this subject: