Canada Goose

 

Branta canadensis

Once threatened with dwindling populations, conservation efforts have made the Canada goose very common throughout North America.

Photograph by Stephen St. John

The ubiquitous Canada goose is one of the best known birds in North America. It is found in every contiguous U.S. state and Canadian province at one time of the year or another.

Canada geese are adaptable to many habitats and may thrive wherever grasses, grains, or berries are available. Because of changing weather, settlement, and farming patterns, many Canada (not "Canadian") geese have begun to alter their migrations. Typically, the birds summered in northern North America and flew south when cold weather arrived. This cycle endures, but some northern populations have shortened their flight to traditional wintering grounds in the southern U.S. and Mexico. Other Canada geese have become permanent residents of parks, golf courses, suburban subdevelopments, and other human habitats across much of North America. In some areas, such as airports, they are so numerous that they are considered a nuisance. Just 50 geese can produce two and a half tons of excrement in a year.

When the birds do migrate, they form impressive and aerodynamic "V-formations." They can cover 1,500 miles (2,400 kilometers) in just 24 hours with a favorable wind, but typically travel at a much more leisurely rate. These noisy groups honk their way along established paths that include designated "rest stops." These social birds remain in flocks year-round, except while nesting.

Link: http://animals.nationalgeographic.com/animals/birds/canada-goose/

Snowy Owl

 

Nyctea scandiaca

The snowy owl's beautiful white plumage helps to hide it in its Arctic habitat. Only the males are completely white. Chicks are dark and spotted, while the females are white with spots on their wings.

Photograph by Norbert Rosing

The ghostlike snowy owl has unmistakable white plumage that echoes its Arctic origins.

These large owls breed on the Arctic tundra, where females lay a clutch of 3 to 11 eggs. Clutch size depends upon the availability of food, and in particularly lean times a usually monogamous pair of owls may not breed at all. Parents are territorial and will defend their nests against all comers—even wolves.

Young owls, especially males, get whiter as they get older. Females are darker than males, with dusky spotting, and never become totally white. Some elderly males do become completely white, though many retain small flecks of dusky plumage.

The snowy owl is a patient hunter that perches and waits to identify its prey before soaring off in pursuit. Snowy owls have keen eyesight and great hearing, which can help them find prey that is invisible under thick vegetation or snowcover. The owls deftly snatch their quarry with their sharp talons.

A snowy owl's preferred meal is lemmings—many lemmings. An adult may eat more than 1,600 lemmings a year, or three to five every day. The birds supplement their diet with rabbits, rodents, birds, and fish.

Read full here... http://animals.nationalgeographic.com/animals/birds/snowy-owl/

Macaw

 

Psittacidae

Of the 17 species of macaws, several are endangered, including the beautiful hyacinth, seen here in flight.

Photograph by Joel Sartore

Macaws are beautiful, brilliantly colored members of the parrot family.

Many macaws have vibrant plumage. The coloring is suited to life in Central and South American rain forests, with their green canopies and colorful fruits and flowers. The birds boast large, powerful beaks that easily crack nuts and seeds, while their dry, scaly tongues have a bone inside them that makes them an effective tool for tapping into fruits.

Macaws also have gripping toes that they use to latch onto branches and to grab, hold, and examine items. The birds sport graceful tails that are typically very long.

Macaws are intelligent, social birds that often gather in flocks of 10 to 30 individuals. Their loud calls, squawks, and screams echo through the forest canopy. Macaws vocalize to communicate within the flock, mark territory, and identify one another. Some species can even mimic human speech.

Flocks sleep in the trees at night, and in the morning they may fly long distances to feed on fruit, nuts, insects, and snails. Some species also eat damp soil, which may help to neutralize chemicals in their fruity diet and ease their stomachs.

Macaws typically mate for life. They not only breed with, but also share food with their mates and enjoy mutual grooming. In breeding season, mothers incubate eggs while fathers hunt and bring food back to the nest.

There are 17 species of macaws, and several are endangered. These playful birds are popular pets, and many are illegally trapped for that trade. The rain forest homes of many species are also disappearing at an alarming rate.

Read full here... http://animals.nationalgeographic.com/animals/birds/macaw/