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# In Kakamega Forest, the season changed the butterfly community more than the habitat label did
- URL: https://intelligence.wildlandseco.com/2026-09-24-kakamega-butterflies-seasonality/
- Published: 2026-09-24T11:45:01.000Z
- Updated: 2026-09-24T11:45:01.000Z
- Description: Six months of weekly surveys across six forest-cover types found wet–dry transitions explaining more community variation than habitat type, with lagged rainfall the strongest abundance predictor.
- Author: Benjamin Worlund
- Tags: butterflies, tropical forest, seasonality, Kenya, Monitoring, Wildlife, Insects, Tropical ecology, phenology, rainfall, #ecological-intelligence, #brief-2026-09-24, #priority-read, #peer-reviewed, #geo-africa

Evidence

Peer-reviewed

Geography

Kakamega Forest ecosystem, Kenya

System

Tropical rainforest fragment / butterfly community

## WHAT THE EVIDENCE SAYS

Weekly surveys from January through June 2024 recorded 10,334 butterflies representing 146 species across six cover types. Abundance, richness and Shannon diversity rose in the wet season, community composition separated by season, and one-month-lagged rainfall was the strongest abundance predictor. Natural and secondary forest still supported the highest abundance and diversity, but season explained more overall community variation than habitat type.

## WHY IT MATTERS / OUR READ

Biodiversity monitoring can misread habitat differences when sampling windows do not span seasonal transitions. For tropical insects especially, timing is part of the survey design—not background noise.

## CAVEATS / UNCERTAINTY

This is one six-month study in one rainforest fragment. It does not establish a long-term climate trend, and seasonal dominance in this system should not be generalized to other taxa, years or tropical forests.

## SOURCE

Journal of Tropical Ecology  
[View original evidence ↗](https://www.cambridge.org/core/journals/journal-of-tropical-ecology/article/abs/wetdry-seasonal-transitions-drive-butterfly-community-dynamics-more-than-habitat-type-in-a-tropical-rainforest-fragment/0F524527834A54F756C8F80F4600389C?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-09-24

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-09-24/)