Bird
From CreationWiki, the encyclopedia of creation science
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Birds belong to the vertebrate Class known as Aves. Scientists have estimated that over 9000 different species of birds exist in the world today. A very distinct feature of a bird, is that they possess wings with feathers. Birds vary greatly in size and shape; from the small agile hummingbird to the large flightless ostrich.
God created birds on the fifth day of creation along with fish. Genesis 1:20,23 says," And God said, "Let the water teem with living creatures, and let birds fly above the earth across the expanse of the sky."
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Anatomy
All birds are warm-blooded vertebrates. Instead of having arms they were created with wings that enable most of them to fly. Most birds have extremely light bones because the core of the bone is hollow. Birds are completely covered in feathers which make them sleek and aerodynamic. The tail of a bird acts like a rudder, and helps it to steer swiftly. Birds are equipped with either beaks or bills, which are highly variable and allow birds to specialize to a variety of niches. Birds respire with a set of lungs and get their nutrients delivered through their circulation system.
Reproduction
Ecology
Birds occupy both aquatic and terrestrial environments. Although omnivores by design, birds have adapted to herbivorous and carnivorous diets. They are very instrumental in spreading seeds from fruits and cereal crops.
Related References
- Birds of the Presidio National Park Service
- Class Aves Unversity of Michigan
- Ave slide show Evansville.edu
- Aves images by Wikimedia Commons
- Introduction to Aves by Ben Waggoner
- Online Field Guide to Birds Biodiversity Institute
External links
- The Feather Atlas U.S. Fish and Wildlife Service Forensics Lab. High-resolution scans of flight feathers of major groups of North American birds as an aid to species identification.
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See Also
Categories: Animal | Aves | Ornithology
