While both of these species became extinct during the 20th century, it seems reasonable to assume a 19th century POD would be required for each.
At one time, the North American population of the passenger pigeon numbered in the billions. However, deforestation and development of the US interior led to shrinking habitats. That, combined with massive hunting, led to a sharp decline in the population from about 1870 onward. The last specimen died in the Cincinnati Zoo in 1914.
The Carolina parakeet, which ranged as far north as New York, suffered a similar decline. The last documented specimen died also in the Cincinnati Zoo in 1918, although some unconfirmed reports of sightings in the 1920s and 1930s kept hopes alive that the species might have survived. However, it was declared extinct in 1939.
So: what would have to happen, presumably sometime in the 19th century, to keep both of these species alive to the present day and at least under protection of latter-day laws?
Bonus 1: have the ivory-billed woodpecker (still alive albeit in very remote areas in the south) more abundant.
Super bonus: have the great auk (extinct since the 1840s) survive to the present day.
At one time, the North American population of the passenger pigeon numbered in the billions. However, deforestation and development of the US interior led to shrinking habitats. That, combined with massive hunting, led to a sharp decline in the population from about 1870 onward. The last specimen died in the Cincinnati Zoo in 1914.
The Carolina parakeet, which ranged as far north as New York, suffered a similar decline. The last documented specimen died also in the Cincinnati Zoo in 1918, although some unconfirmed reports of sightings in the 1920s and 1930s kept hopes alive that the species might have survived. However, it was declared extinct in 1939.
So: what would have to happen, presumably sometime in the 19th century, to keep both of these species alive to the present day and at least under protection of latter-day laws?
Bonus 1: have the ivory-billed woodpecker (still alive albeit in very remote areas in the south) more abundant.
Super bonus: have the great auk (extinct since the 1840s) survive to the present day.