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IDProjectCategoryView StatusLast Update
0013204Dwarf FortressAnimal Populationspublic2025-06-28 21:52
ReporterDrakli Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformSteamOSWindowsOS Version11
Product Version51.13 
Summary0013204: River animals don't spawn after embark
DescriptionWhen first arriving on an embark, rivers are full of non-vermin animals like various large fish (like tigerfish and milkfish,) hippos, alligators, etc. They linger for a couple of months, but after they wander after the map, no other river creatures ever appear again.
Steps To ReproduceSet up a 4x4 embark fortress with a major river. (30 squares wide.) Played for 10 months game-time, watching the animal populations. After the first month no new river creatures spawned. Set up a new 1x1 embark next to a river (24 squares wide) and used DF-Hack to force-spawn new animals 25+ times. No new river creatures ever emerged; everything afterwards was land-based or flying.
Additional InformationI believe I've seen creatures, like alligators or crocodiles, emerge from swamp or marsh edge-tiles if they're available, so it might only apply to creatures that need river edge-tiles to enter the map. It's been a long while since I've seen an alligator outside of the first couple of months after embark, so I can't confirm it one way or another.
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Date Modified Username Field Change
2025-06-28 21:52 Drakli New Issue