Credits
The tools, decision models, sound and field data behind ChimpBench, then the studies it draws on. Full notes are in research.md and simulation.md.
Built with
- three.js · 3D rendering · MIT
- SQLite WASM · @sqlite.org/sqlite-wasm, saves in the browser
- math (pmndrs) · small vector helpers, used for the Vec3 type · MIT
- Vite · build and dev server
- TypeScript · the language
- AMD FidelityFX Super Resolution 1 · upscaling, ported to WebGL in src/render/env/post.ts; © 2021 Advanced Micro Devices · MIT
- Web Audio · the browser API that mixes the sound
- Fraunces · display font, from Google Fonts · SIL OFL
- Instrument Sans · interface font, from Google Fonts · SIL OFL
- JetBrains Mono · numbers and code, from Google Fonts · SIL OFL
Decision models
- Rules · built into ChimpBench: a simple recipe scores each legal option
- GLiNER2.5-Decide by Fastino · the small model the app runs live, on your computer · Apache 2.0
- gliner2 · Fastino's library that loads and runs it
- DeBERTa-v3-large by Microsoft · the encoder GLiNER2.5-Decide is built on
- PyTorch · runs the model
- Hugging Face Transformers · model code underneath
- Trained adapters (LoRA) · three temperaments of GLiNER trained for this project, with Hugging Face PEFT
- Jev by TypeSafe · a System One model, tested offline only; its answers are never used for training
Sound
The chimpanzee calls and the rainforest ambience in the app and in the guide come from the Epidemic Sound library, under the project owner's licence. Buttress drumming is synthesized in code.
- Epidemic Sound · recorded calls and forest ambience · licensed
Field data
Open datasets the simulation and the guide use, credited under their licences. Only derived statistics and normalized maps are published, never raw records or locations, and the authors have not endorsed these uses.
- Potts, Watts, Langergraber & Mitani 2020, Dryad · Ngogo tree phenology and rain 1998–2017; builds the simulated forest's fruit calendar (Biotropica) · CC0
- Langergraber, Watts, Vigilant & Mitani 2018, Dryad · Ngogo boundary patrols 1996–2015 (PNAS) · CC0
- Sandel, Mitani, Langergraber et al. 2026, Dryad · Ngogo patrols after the split (Science) · CC0
- Massaro, Gilby, Desai et al. 2022, Dryad · Gombe boundary patrols and edge visits 1978–2007 (Phil Trans R Soc B) · CC0
- Pusey & Schroepfer-Walker 2014, Dryad · Gombe 15-minute focal follows 2000–2003, the held-out movement check (Phil Trans R Soc B) · CC0
- Sandel, Lee, Angedakin et al. 2026, Zenodo · Ngogo GPS space use, for the home-range comparison · CC BY 4.0
- Lemoine, Samuni, Crockford & Wittig 2023, PLOS Biology · S1–S3 Data: Taï movement, activity and border stops · CC BY 4.0
- Lemoine, Boesch, Preis et al. 2020, figshare · Taï territory sizes (R. Soc. Open Sci.) · CC BY 4.0
Sources
- Potts, Chapman & Lwanga 2009 · food trees at Ngogo vs. Kanyawara
- Wood et al. 2017 · Ngogo life expectancy
- Watts & Mitani 2001 · boundary patrols at Ngogo
- Langergraber et al. 2017 · who joins patrols
- Mitani, Watts & Amsler 2010 · territorial expansion after lethal aggression
- Sandel & Watts 2021 · lethal aggression after the Ngogo fission
- Wilson, Hauser & Wrangham 2001 · playback and numerical assessment
- Wilson et al. 2012 · intergroup encounters at Kanyawara
- Wilson et al. 2014 · lethal aggression across communities
- Mitani & Watts 1999 · what drives hunting
- Mitani & Watts 2001 · why chimps hunt and share meat
- Watts & Mitani 2002 · hunting at Ngogo
- Gilby et al. 2015 · impact hunters and hunt success
- Crockford et al. 2012 · alarm calls for ignorant group members
- Kutsukake & Castles 2004 · reconciliation and consolation
- Fraser, Schino & Aureli 2008 · components of relationship quality
- Lewis et al. 2023 · remembering groupmates for decades
- Foerster et al. 2016 · females queue, males compete
- Neumann et al. 2011 · Elo-rated dominance
- Bray et al. 2017 · how infants learn to feed
- Bădescu et al. 2022 · nursing and weaning at Ngogo
- Walker et al. 2018 · female maturation at Gombe
- Wallis 1997 · gestation and birth spacing at Gombe
- Samson & Hunt 2014 · how chimps pick nest trees
- Altmann 1974 · sampling methods for watching behavior
- Villioth et al. 2025 · diet and feeding time at Budongo
- Parr et al. 2007 · chimp facial expressions
- Sandel et al. 2026, Science · lethal conflict after the Ngogo fission
- Lemoine et al. 2023, PLOS Biology · Taï movement and elevation
- Lemoine et al. 2020, R. Soc. Open Sci. · Taï territory size and dominance