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i didnt exactly feel like i wiped the other animals on the map out to the point where they had to re spawn. i never killed all the animals around the center  for them to respawn on the outskirts. Ive never observed it enough to confirm but it feels as though they just congregate around the edges over time

I mean, you don't have to kill the animals. A lot of things cause death, and most of them aren't controlled by the player.
Carnivores hunt and kill other animals. Animals die of old age. Existing animals can go manhunter (which will almost certainly lead to their death). Wild fires kill animals. On some maps, especially Tropical Forests, infections kill a lot of animals (animal gets hurt by something - forest fire, for example - the wound gets infected = guaranteed death). Cold snaps/heat waves/toxic fallouts kill everything alive.
Sometimes it only takes one boomalope to die of a heart attack to snowball into a small catastrophe, where animals burn to death, and those lucky enough to remain get infected and die. Players don't always notice such things, but it still leads to new animals spawning and staying near the map edges.

Also when a non-pregnant female animal spawns, all male species rush to it, which leads to male species "migrating". I doubt it's really noticeable but it may be a part of the problem as well.

I think it happens because new animals spawn near the borders. There is enough grass for herbivores there, so they have no reason to move elsewhere. Since all herbivores are so conveniently packed together, carnivores too have no need to move.

It's "caused" by animals spawning - so, basically anything that kills the animals. Hunting, toxic fallouts, cold snaps, heat waves, aging.

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I got tired of using headphones so I un-plugged them and turned my speakers on. After that my games stopped responding completely, so I had to force-stop the process.
To make sure it can be reproduced I tried un-plugging my headphones again, and game crashed on the main menu screen.
I experienced this bug both with mods and without them. I also noticed that this problem occurs only if I start the game with headphones plugged; if I start the game with speakers and then plug my headphones, it works fine. In this case un-plugging headphones will not lead to crash.
Log file included, although I couldn't find anything useful there. ^{Yes I know I'm using pirated version, please don't beat me. It's not because I'm a bad guy, but because I'm still waiting for GoG release.}

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You can clearly see it in the attached screenshot (I don't think additional info is required here).
Sorry if it was reported before, I'm too lazy to check.

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