Mousebirds move wild cotton seeds over 1 km
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- Mousebirds in Eswatini deliberately gathered wild cotton (Gossypium herbaceum) fibers and carried them in their beaks to nest sites, using the material as lining.
- Nests examined at Mbuluzi Game Reserve contained up to 200 intact cotton seeds each, and color‑marked seeds were traced to origins more than one kilometer from the parent plants.
- Cameras recorded that birds reused cotton from old nests, indicating the potential for multi‑step seed transport beyond a single breeding season.
- Researchers led by Roos van der Meer published the findings in the journal Oikos (2026), highlighting that nest‑building behavior can rival wind in dispersing wild cotton.
- Sjouke Anne Kingma of Wageningen University & Research noted that animal‑mediated seed movement can help plants cross barriers such as rivers or fragmented habitats, enhancing ecosystem resilience.
- The study emphasizes that animal‑driven dispersal may be crucial for plant populations in a changing climate and habitat loss.
Why it matters: The finding shows that protecting mousebirds directly supports wild‑cotton regeneration and landscape connectivity, while declines in such nest‑building birds could hinder seed spread, reduce plant resilience to climate change, and fragment ecosystems. This underscores the ecological value of animal‑mediated dispersal and the risk of biodiversity loss if key avian species disappear.
