Post on 08-May-2015
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DESCRIPTIONtalks about birds
- 1.Flying Animals They are around 10,000 living species of birds around theglob. Modern birds are characterized by: Feathers a beak without teeth . the laying of hard-shelled eggs. a high metabolic rate. a four-chambered heart. a lightweight but strong skeleton.
2. Flying Animals continue All living species of birds have wingsthe now extinctflightless Moa of New Zealand was the only exception. most bird species can fly, with some exceptions, includingratites, penguins, and a number of diverse endemic islandspecies. Birds also have unique digestive and respiratory systemsthat are highly adapted for flight. Many species take on long distance annual migrations,and many more perform shorter irregular movements. 3. Flying Animals continue Birds are social; theycommunicate usingvisual signals andthrough calls and songs,and participate in socialbehaviors, includingcooperative breedingand hunting, flocking,and mobbing ofpredators. 4. Flying Animals continue Eggs are usually laid in anest and incubated bythe parents. Most birds have anextended period ofparental care afterhatching. The picture on the rightis a robins nest. 5. hummingbirds hummingbird are thesmallest birds onearth (length of 5centimeters). Hummingbirds are smallbirds capable of hoveringin mid-air due to therapid flapping of theirwings. 6. Hummingbirds continue They are the only birds that can fly backwards. There are 337 species world wide, 23 North American species, and 5 Michigan species. 7. Hummingbirds continue .A female hummingbirds are bluish green with a pale gray underside. The tips of their tail feathers have white spots. Breeding males have a reddish to pink head, chin, and throat. The female lays only two eggs at a time. 8. Ostrich Ostrich is the largestbird on earth(9ft). The Ostrich is one ortwo species of largeflightless birds native toAfrica, the only livingmember(s) of the genusStruthio. 9. Ostrich continue Some analyses indicatethat the Somali Ostrichmay be better considered afull species apart from theCommon Ostrich, butmost taxonomists considerit to be a subspecies. The Ostrich is the largestliving species of bird andlays the largest egg ofany living bird. 10. North American Robin The American Robin or North American Robin (Turdusmigratorius) is a migratory songbird of the thrush family. It is named after the European Robin because of itsreddish-orange breast, though the two species are notclosely related, with the European robin belonging to theflycatcher family. The American Robin is widely distributed throughoutNorth America, wintering south of Canada from Florida tocentral Mexico and along the Pacific Coast. 11. North American Robin continue A Robin lays three to fivelight blue eggs per mate. The eggs hatch after14 days, and the chicksleave the nest a furthertwo weeks later. The chicks are fed: worms Insects berries 12. Bird Eggs Bird eggs are laid byfemales and incubated fora time that variesaccording to the species; asingle young hatches fromeach egg. Some birds lay eggs evenwhen not fertilized (e.g.hens); it is not uncommonfor pet owners to find theirlone bird nesting on aclutch of unfertilized eggs,which are sometimescalled wind-eggs.