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Mark-Recapture Population Survey (2D)

Interactive 2D mark-recapture simulator: capture and tag a wandering animal population on a flat field plot, take a second sample, and watch the Lincoln-Petersen / Chapman estimator reconstruct the true population size from live capture data. Pan and zoom the field yourself.

Ecology & Conservation Biology2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

Watch a wandering animal population inhabit a flat 2D field plot, then run the exact two-step protocol field ecologists use to estimate a population that can never be fully counted: capture and tag a first random sample, let the population remix, then capture a second sample and see how many recaptures carry a tag. A live Lincoln-Petersen / Chapman estimator turns those three numbers — marked, sampled, recaptured — into a population estimate you can check against the true (otherwise hidden) population size. Drag to pan the field and scroll or pinch to zoom in on individual animals.

⚙ Under the hood

ecologymark-recapturepopulation estimationLincoln-PetersenChapman estimatorwildlife surveystatisticsfield biology

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install