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There are about 800 species of birds in our country and almost one third of those are "endangered, threatened or in significant decline." These are the findings of a study that not only found the main causes (habitat loss, invasive species and human behavior), but also gave some solutions to the problem: conservation.

Conservation measures were already taken in the case of some bird species and it really showed. Those species of birds showed significant recovery.

The study called "State of the Birds" kicked off in 2007 after it received the ok and the sponsorship of then-president George W. Bush. Several organizations such as the US Geological Survey and the American Bird Conservancy worked together to carry out the study.

The most affected habitats were in Hawaii. The birds living in the Hawaiian islands are facing the highest risk of extinction in the United States. Ocean habitats, grasslands and arid lands are also habitats where specific bird species are struggling to survive. American Bird Conservancy VP David Pashley warned that habitats such as the Hawaii are very close to losing "entire suites of unique bird species."

Beside the habitat loss, many bird species are facing threats caused by humans such as pesticides, collisions with windows, towers and buildings, Mr. Pashley said.

Meanwhile, birds living in habitats characterized by waterfowls and wetlands regaining some ground after environmentalist groups made efforts to conserve the habitats.

Te findings of the report struck a sensitive cord in Interior Secretary Ken Salazar, who said the "State of the Birds" should serve as a call to action and for more investment in the Fish and Wildlife Service.

"If we move forward with a new ethic of conservation, we will be able to restore bird populations," Mr Salazar said in a new conference according to The New York Times.