Carolina Wren 

Thryothorus ludovicianus

Favoring warmer southern climates, the Carolina wren—the state bird of South Carolina—fills its habitat with sweet songs.

Photograph by Mark Chappell/Animals Animals—Earth Scenes

The Carolina wren is an adaptable dweller of forestlands, swamps, farms, and tree-filled human communities.

Carolina wrens (Thryothorus ludovicianus) are small but very vocal animals. Males are especially outgoing and are the only ones to produce songs. They employ one of the loudest songs per volume of birds. They are apt to sing anytime and anyplace they happen to be.

Carolina wrens are usually found in pairs, and each pair stays on its home territory all year long. Because these wrens cannot survive cold winters, they tend to live in southern climes, and are the official state bird of South Carolina. They are found as far north as the Great Lakes, and warm winters spur them to extend their range northward. However, when colder years arrive, many northern birds are unable to survive and fringe populations plummet.

These large wrens feed on insects, larvae, and spiders but also eat berries and fruit. They forage on or near the ground and hop along far more often than they fly. They use their bills to poke about and search for hidden meals and try to remain close to brush in which they can hide.

Carolina wrens are monogamous, and breeding pairs may stay together for years. They work together to construct nests—which may be found almost anywhere. Wrens nest in natural locations such as branches, tree-holes, and stumps but also frequent windowsills, mailboxes or other attractive human-made spots.

Females lay about four eggs and incubate them for two weeks while their mates bring them food. Both parents feed their chicks for an additional two weeks before they gain independence. A mating pair of Carolina wrens may have several broods each year.

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http://animals.nationalgeographic.com/animals/birds/carolina-wren/

Tundra Swan

Cygnus columbianus

The graceful tundra swan feeds not only on underwater flora and shellfish but has developed a taste for grains and corn, much to the chagrin of farmers.

Photograph by Bates Littlehales

The snowy white tundra swan breeds in the Arctic and migrates many miles to winter on North America's Atlantic and Pacific coastlines, bays, and lakes. The eastern population frequents the Chesapeake Bay and North Carolina, while the western population typically winters in California. These animals fly some 3,725 miles (6,000 kilometers) round-trip between their distant habitats, and make the daunting journey twice each year. Tundra swan subspecies also winter in Europe and Asia.

Tundra swans are often confused with trumpeter swans, and indeed the two species are very similar in appearance. They are most easily distinguished by their calls.

Tundra swans winter on the water and sleep afloat. They are strong and speedy swimmers that take to the air with a running start, clattering across the water's surface with wings beating. In flight, the rhythmic flapping of the swan's wings produces a tone that once earned it the name "whistling swan."

These large birds feed by dipping their heads underwater to pluck aquatic plants, tubers, and roots. They also eat shellfish and are developing an increasing taste for grains and corn found in farmland areas.

Believed to mate for life, these swans actually pair up for nearly an entire year before breeding. Though in their winter grounds they gather in huge flocks, they breed as solitary pairs spread out across the tundra. Each couple defends a territory of about three-fourths square miles (two square kilometers).

The bird's tundra nests are large stick dwellings lined with moss and grasses. Ideally, they are situated close to a pond or other water source.

Females typically lay about four eggs and incubate them for 32 days while males guard the nest. Young chicks are protected from cold and predators, including swarms of voracious Arctic mosquitoes. Tundra swans can be nasty when aroused, and the birds may even be able to fend off predators like foxes and jaegers.

Read full here... http://animals.nationalgeographic.com/animals/birds/tundra-swan/

Osprey 

Pandion haliaetus

An osprey preparing to dive

Photograph courtesy NASA

Ospreys are superb fishers and indeed eat little else—fish make up some 99 percent of their diet. Because of this appetite, these birds can be found near ponds, rivers, lakes, and coastal waterways around the world. Ospreys hunt by diving to the water's surface from some 30 to 100 feet (9 to 30 meters) up. They have gripping pads on their feet to help them pluck fish from the water with their curved claws and carry them for great distances. In flight, ospreys will orient the fish headfirst to ease wind resistance.

Ospreys are sometimes confused with bald eagles, but can be identified by their white underparts. Their white heads also have a distinctive black eyestripe that goes down the side of their faces. Eagles and ospreys frequent similar habitats and sometimes battle for food. Eagles often force osprey to drop fish that they have caught and steal them in midair.

Human habitat is sometimes an aid to the osprey. The birds happily build large stick-and-sod nests on telephone poles, channel markers, and other such locations. Artificial nesting platforms are common in areas where preservationists are working to reestablish the birds. North American osprey populations became endangered in the 1950s due to chemical pollutants such as DDT, which thinned their eggshells and hampered reproduction. Ospreys have rebounded significantly in recent decades, though they remain scarce in some locales.

read full here... http://animals.nationalgeographic.com/animals/birds/osprey/