Passenger Pigeons: Native to N. America, flocks of birds at one time were so large it was said they could block out the sun. One flock in 1866 was described as being 1 mile wide, 300 miles long and took 14 hours to pass, with estimated numbers of birds in excess of 3.5 billion. The species went from being one of the most abundant birds in the world to extinction during the space of just 100 years. Martha, thought to be the world's last Passenger Pigeon, died on Sept. 1, 1914 at Cincinnati…

Passenger Pigeons: Native to N. America, flocks of birds at one time were so large it was said they could block out the sun. One flock in 1866 was described as being 1 mile wide, 300 miles long and took 14 hours to pass, with estimated numbers of birds in excess of 3.5 billion. The species went from being one of the most abundant birds in the world to extinction during the space of just 100 years. Martha, thought to be the world's last Passenger Pigeon, died on Sept. 1, 1914 at Cincinnati…

Passenger Pigeon - The species went from being one of the most abundant birds in the world during the 19th century to extinction early in the 20th century.  The world's last Passenger Pigeon, died on September 1, 1914.

Passenger Pigeon - The species went from being one of the most abundant birds in the world during the 19th century to extinction early in the 20th century. The world's last Passenger Pigeon, died on September 1, 1914.

Passenger Pigeon. Hunted to extinction, they once numbered in the billions. Their huge flocks looked like black clouds that went on for miles. The last Passenger Pigeon, 'Martha', died in 1914 at the Cincinnati Zoo.

Passenger Pigeon. Hunted to extinction, they once numbered in the billions. Their huge flocks looked like black clouds that went on for miles. The last Passenger Pigeon, 'Martha', died in 1914 at the Cincinnati Zoo.

Ancient DNA Could Return Passenger Pigeons to the Sky - Genetic engineering could restore the once profuse North American bird after a century or more of extinction

Ancient DNA Could Return Passenger Pigeons to the Sky - Genetic engineering could restore the once profuse North American bird after a century or more of extinction

Martha, the last passenger pigeon. She died Sept 1, 1914, marking the 100th anniversary of the extinction.

100 years later, the passenger pigeon still haunts us

Martha, the last passenger pigeon. She died Sept 1, 1914, marking the 100th anniversary of the extinction.

Century After Extinction, Passenger Pigeons Remain Iconic—And Scientists Hope to Bring Them Back

Billions of passenger pigeons once filled the skies of eastern North America. Martha, the last one, died at the Cincinnati Zoo in 1914 | Taxidermic specimen, Smithsonian Institution's National Museum of Natural History, Washington, D.C.

http://www.mnn.com/earth-matters/animals/blogs/100-years-later-the-passenger-pigeon-still-haunts-us  (Unit #6)

100 years later, the passenger pigeon still haunts us

http://www.mnn.com/earth-matters/animals/blogs/100-years-later-the-passenger-pigeon-still-haunts-us (Unit #6)

Passenger Pigeon (1914):  The Passenger Pigeon was a bird that existed in North America until the early 20th century when it went extinct due to hunting and habitat destruction.  It is believed that this species once constituted 25 to 40 percent of the total bird population of the United States.  Martha, thought to be the world's last Passenger Pigeon, died on September 1, 1914, at the Cincinnati Zoo. The aviary cage where Martha died is now the Passenger Pigeon Memorial.

Martha, the World’s Last Passenger Pigeon

Passenger Pigeon (1914): The Passenger Pigeon was a bird that existed in North America until the early 20th century when it went extinct due to hunting and habitat destruction. It is believed that this species once constituted 25 to 40 percent of the total bird population of the United States. Martha, thought to be the world's last Passenger Pigeon, died on September 1, 1914, at the Cincinnati Zoo. The aviary cage where Martha died is now the Passenger Pigeon Memorial.

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