Hacker News
Whooping Cranes Learned to Migrate by Following Costumed Pilots
48 points by kgolubic
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6 comments
trescenzi
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What a throwback. I haven't thought about the movie Fly Away Home since I was a child. Really awesome to see people caring enough about animals to do stuff like this.
lolc
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With a population bottleneck of only 21 individuals, it sounds like their entire population is inbred. Even if it's hundreds of individuals now.
magicalhippo
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Seems you need more like thousands to ensure survivability, and it gets non-linearly worse as population gets smaller.
https://www.sciencedirect.com/science/article/abs/pii/S00063...