Bird populations in North America have declined by 2.9 billion since 1970, study finds

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New research has concluded that the bird population in North America has declined by 29 percent since 1970.

The study stated that almost 90 percent of the loss included common birds such as sparrows, blackbirds and swallows. Significant amounts of shorebirds, grasslands birds and forest bird populations have also declined.

Researchers analyzed almost 50 years of bird-monitoring data collected from 143 radar stations across North America.

Authors of the study noted that habitat loss may be the leading factor in bird decline, according to a news release from Cornell University.

The study mentioned that birds are beneficial to the ecosystem as they disperse seeds and help with pest control.

A website released with the study called 3billionbirds.org included a list of suggestions to help birds survive. This includes installing window screens on the outside of the window to prevent birds from crashing into windows, avoiding the use of pesticides and keeping your cat indoors.

In the news release, the authors of the study mentioned that there is hope as birds such as hawks, eagles and other birds of prey have actually tripled their populations since 1970.

Lead author of the study Kenneth Rosenberg from the Cornell Laboratory of Ornithology said that none of these declines are hopeless, but that may not be true 10 years from now.

RUNDOWN SHOWS:
1. Bird populations that are in decline
2. How researchers collected the data and why bird populations may be in decline
3. Why birds are beneficial to the ecosystem
4. Ways we could help birds survive

VOICEOVER (in English):
"New research has concluded that the bird population in North America has declined by 29 percent since 1970."

"The study published in the journal Science stated that almost 90 percent of the loss included common birds such as sparrows, blackbirds and swallows."

"Significant amounts of shorebirds, grasslands birds and forest bird populations have also declined."

"Researchers analyzed almost 50 years of bird-monitoring data collected from 143 radar stations across North America."

"According to a news release from Cornell University, authors of the study noted that habitat loss may be the leading factor in bird decline."

"The study mentioned that birds are beneficial to the ecosystem as they disperse seeds and help with pest control."

"A website released with the study called 3billionbirds.org included a list of suggestions to help birds survive."

"This includes installing window screens on the outside of the window to prevent birds from crashing into windows, avoiding the use of pesticides and keeping your cat indoors."

SOURCES: BBC News, CNN, Cornell University, Science, CBC, 3billionbirds.org, Scientific American
https://www.bbc.com/news/science-environment-49744435
https://edition.cnn.com/2019/09/19/world/north-america-bird-population-loss-scn/index.html
http://news.cornell.edu/stories/2019/09/nearly-30-birds-us-canada-have-vanished-1970
https://science.sciencemag.org/content/early/2019/09/18/science.aaw1313
https://www.3billionbirds.org/7-simple-actions
https://www.cbc.ca/news/technology/bird-population-decline-1.5288454
https://www.scientificamerican.com/article/silent-skies-billions-of-north-american-birds-have-vanished/