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A comment on Bird populations declining fast across North America. Parent comment

Re:Bird populations declining fast across North America by lettergram on Monday December 13, 2021 @07:30PM (#29546655)
Bob cats, mountain lions, etc used to have the entire US as their range. I suspect the bird population boomed after we got rid of the cats (100-150 years ago). Now that we have house cats they’re dropping again.

Boom-bust cycles for animals are common. I try to reflect what the natural order was 10,000 years ago and reflect. 20,000 years ago, there was an ice sheet over North America - ie no birds.

https://en.m.wikipedia.org/wiki/Laurentide_Ice_Sheet

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Re:Bird populations declining fast across North America by AlotOfReading on Monday December 13, 2021 @08:44PM (#29547163)
Unless you're talking about the lynx (which mainly eats hares), the historic ranges of American cats barely overlap with LGM ice cover. It's not very relevant to this discussion.
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