Reading Stars, Fish and River Levels: Indigenous Calendars and Land Care in the Amazon
Original Chinese title: 亞馬遜原住民族看星星種田：從星象、魚群到河水漲落，傳統曆法如何守護土地？
A September 24 ISA report describes Tukano, Desana and Baniwa representatives sharing ecological astronomy at a cultural astronomy meeting. The case offers Taiwan a way to consider community-led seasonal records while preserving differences between peoples and local authority over knowledge.
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On September 24, 2026, Brazil’s Socio-Environmental Institute (ISA) reported that representatives of the Tukano, Desana and Baniwa peoples had shared ecological calendars at cultural astronomy events held in Rio de Janeiro from September 14 to 20. This international case from September connects the sky with farming, fishing and river life through continuing observation and interpretation by knowledge holders. ISA | Rio Negro representatives share ecological calendars
Connecting changes in the sky and on the ground
The Indigenous Environmental Management Agents (AIMAs) described in the report keep diaries of river levels, flowering and fish migration, using constellations as temporal references. Baniwa representative Walter Lopes da Silva explained that the Baniwa and Koripako calendar in his Ayari River region continues to develop through exchanges with elders. Desana representative Ismael dos Santos described changes in the timing of rain and sunshine. His account is local experience, rather than a statistical climate assessment for the entire Amazon.
Reading the stars for farming therefore does not mean following a universal planting timetable. Celestial references are interpreted alongside local hydrology, plants and activities. Calendars belonging to different peoples, river stretches and languages should retain those distinctions.
Two older studies clarify different temporal scales
Cardoso’s 2016 paper reports research conducted from 2005 to 2007 with Tukano, Desana and Tuyuka communities and Yupuri School. It considers constellations alongside wet and dry periods, planting, harvesting and river levels, and notes that communities may begin their annual cycles differently. This is historical and methodological background, rather than a new discovery in 2026. The study does not establish a quantified crop-yield benefit. Cardoso (2016) | Constellations and time keeping in the northwestern Amazon
Sinha’s study, published on March 18, 2019, concerns Huni Kuĩ, Awetý and Kamaiurá communities. Its discussion of event-based time shows how environmental, celestial and social events can organize time reckoning. It cannot establish particular star names, crop dates or ceremonies for Rio Negro peoples. Each study has its own geographical, historical and cultural scope. Sinha (2019) | Event-based time in three Indigenous Amazonian and Xinguan cultures
A possible approach for Taiwan: communities decide what to record and use
The useful comparison for Taiwan concerns collaborative methods. If a community wishes to document environmental observations, it could begin with events it agrees may be shared, keeping language, observer, location scale, year and unusual conditions together. This is a methodological suggestion. It does not claim that any Taiwanese people has adopted an Amazonian calendar or associate a particular star with a Taiwanese crop.
Records should accommodate disagreement. The same event may occur at different times on different slopes, elevations or farms. A missing fish observation may reflect a gap in recording. Separating original accounts, observations and later interpretations helps younger participants understand what elders contributed and what needs another season of observation.
Schools and agricultural support organizations participating in such work should agree on its purpose with knowledge holders: internal teaching, environmental tracking and public display may require different disclosure rules. Stories, ceremonies, species locations and family knowledge may remain unrecorded, offline or within community-controlled storage. A published paper does not make the entire knowledge system available for unrestricted reuse.
AI can organize approved diaries, maintain versions, flag missing fields and draft translations. It should not invent unobserved events or combine narratives from different peoples into a new tradition. Communities should review the results, correct errors and retain withdrawal options. Whether the work improves farming arrangements or teaching should be assessed against goals set by participants. Land care depends on knowledge relationships that remain usable and open to correction.
Sources and further reading
- ISA | Rio Negro representatives share ecological calendars (September 24, 2026; events held September 14–20).
- Cardoso (2016) | Constellations and time keeping in the northwestern Amazon (2016; fieldwork during 2005–2007).
- Sinha (2019) | Event-based time in three Indigenous Amazonian and Xinguan cultures (March 18, 2019; contextual research on different peoples).
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AI use and content-safety disclosure
Collective authorship by the Mountain and Sea Data Desk using public reporting and research, with AI assistance for text and translation. No field interviews were conducted in Amazonian or Taiwanese communities. This article does not speak for any people or disclose restricted cultural knowledge.