To count an animal population if you can't catch them all: capture some, mark them, release, and capture again. The ratio of new vs already seen tells you something about the total number. Shown here is iterated mark-and-recapture with a Bayesian updates to belief about pop sizepic.twitter.com/jZF7HXddiq
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Replying to @AndrewM_Webb
You need some estimate of how much they are moving around, right?
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Replying to @stubborncurias
Andrew M. Webb Retweeted Andrew M. Webb
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Replying to @AndrewM_Webb @stubborncurias
I believe they use exactly this reasoning for tiger census, except using camera traps that are moved aroundhttps://www.worldwildlife.org/stories/what-can-camera-traps-tell-us-about-tigers-and-their-homes …
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