Sunday, March 4, 2012

In winter, the mystery of North American bird is often confused with its sister species (including helpful videos)

Horned Grebe

Podiceps auritus


colymbus auritus

), officially known through the United States as the grebe, and also known by a number of other names, such as the Slavs podiceps, the devil, hell-diver Diver, diving with pink eyes, and the witch of water , photographed at Merritt Island National Wildlife Refuge, Titusville, Florida (USA).

image:. H Steven Dolan, February 11, 2012 (creative commons, reuse is only possible with proper attribution) [velociraptorize] Nikon D90 Sigma 150-500 F5.6


  • Question:
  • This mystery of the North American bird is remarkable for its morphological characteristics. What trait of what it is? What are some consequences of this function? Can you identify this taxonomic family of birds and species?


    It is a horned grebe

    Podiceps auritus

    , commonly known as the name of the diver horns in the United States. This person is in winter plumage. This circumpolar species is placed in the family Podicipedidae diver. Slav grebes (horned grebes) is in Europe, Asia, much of Canada and the United States. While some birds winter in inland water bodies, most birds migrate in winter to estuaries and coastal protected areas.

    This species, like his parents, is one of the waterfowl, whose body was held under water for diving and swimming, so that your feet are placed in the back of your body, making it difficult for these birds walk. Slavonian / horned grebes feed by capturing prey in shallow water or removing water from the surface. They feed on fish and aquatic invertebrates such as insects and larvae, crustaceans, mollusks and worms. Fish and shellfish are more of the diet of this species during winter, when at sea.

    Slavonian grebes

    or horns of both sexes are similar, and their plumage that distinguishes them from their relatives. They breed in freshwater lakes. The nest is usually built on a floating platform of vegetation near the lake shore in shallow water, hidden in thick vegetation.

    In winter plumage, the horned grebe / horns is mainly white with a black bonnet well defined, red eyes, white spots on the wings and the back usually comes down to the water. However, it can be confused with a number of his relatives:
    the pied-billed grebe,

    Podilymbus podiceps
    , shows very little difference between breeding and wintering plumage. It has a black band around its bill near the terminal (which is clear to dark gray in winter), its peak is significantly thicker and shorter, has dark eyes surrounded by a thin white line, and lack of white spots on the wings, but good luck to see these patches and loons do not tend to fly much. The rear light and fluffy sticks above the surface of the water

    Red-necked Grebe

    P. grisegena
    , is a large bird with a bill much longer. In winter plumage, has a "dirty" gray face and neck and the beak is yellowish or greenish yellow with a dark climax

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