SGhockeychika4 asked in PetsBirds · 10 years ago

How did these birds get to the USA and what problems do they pose for our native species?

House Sparrow

European Starling

Brown-headed Cowbird

Great Blue Heron

Red-winged Blackbird

Osprey

Belted Kingfisher

Bald Eagle

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  • Tori
    Lv 7
    10 years ago
    Favorite Answer

    The following on your list are all native species and are part of the natural ecosystems of North America:

    Brown-headed Cowbird

    (they are not introduced, but they lay their eggs in the nests of other birds which has contributed to declines in the numbers of warblers particularly - although the warblers survived fine with the cowbirds laying eggs in their nests for millions of years until humans caused declines in the warbler popluations by messing up their habitats.)

    Great Blue Heron

    Red-winged Blackbird

    Osprey

    Belted Kingfisher

    Bald Eagle

    There are 200 million in North America descended from 60 to 100 birds [1] released in Central Park, New York by Eugene Schieffelin. He was president of the infamous American Acclimatization Society which tried to introduce every bird species mentioned in the works of William Shakespeare to North America in 1890, and this turned into a terrible environmental disaster.[36]

    Being an introduced species European starlings are exempt from the Migratory Bird Treaty Act.[37] Starlings are among the worst nuisance species in North America. The birds travel in enormous flocks; pose danger to air travel; disrupt farms; displace native birds; and roost on city blocks. Corrosive droppings on structures cause hundreds of millions of dollars of yearly damage. In 2008 the U.S. government poisoned, shot or trapped 1.7 million, the most of any nuisance species.[38]

    The European Starling was brought to N. America by Eugene Schieffelin who released about 60-100 of the birds in central park in New York.

    From wikipedia

    "He was president of the infamous American Acclimatization Society which tried to introduce every bird species mentioned in the works of William Shakespeare to North America in 1890, and this turned into a terrible environmental disaster.

    Being an introduced species European starlings are exempt from the Migratory Bird Treaty Act. Starlings are among the worst nuisance species in North America. The birds travel in enormous flocks; pose danger to air travel; disrupt farms; displace native birds; and roost on city blocks. Corrosive droppings on structures cause hundreds of millions of dollars of yearly damage. In 2008 the U.S. government poisoned, shot or trapped 1.7 million, the most of any nuisance species."

    The house sparrow was also brought to North America. The first time some were released occurred when fifty pairs from England were released in Brooklyn, New York, in 1852

    The main problem posed to our native species by both house sparrows and starlings is that they are both cavity nesters who compete aggressively with native birds for nesting sites in hollow dead trees. Most people cut down trees that are dead instead of leaving them standing, so there are fewer places for birds to nest.

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