health
February 28, 2026
‘Who’d guess they’re the same species?’ What Italy’s wall lizards reveal about genetic diversity and why it matters
Understanding biodiversity within species is key to our understanding of why nature works the way it does, say researchers
TL;DR
- Biodiversity extends beyond species count, encompassing variations within species.
- Common wall lizards in Italy display remarkable color differences, with three established morphs (white, yellow, orange) coexisting for millions of years.
- A newly emerged, larger, and more aggressive nigriventris morph could disrupt this balance and potentially lead to the extinction of the older morphs.
- This rapid shift in diversity illustrates how new traits can alter natural processes maintaining within-species variety.
- Conservation of biodiversity within species is vital for adaptation and future survival.
- The Aeolian wall lizard, found on small islets north of Sicily, is endangered due to habitat degradation, invasive black rats, and competition from the Italian wall lizard.
- The Life Eolizard project is implementing habitat restoration, rat control, and invasive lizard removal.
- Captive breeding programs and genomic data are being used to maximize genetic diversity and resilience for reintroduction efforts.
- Establishing dedicated sanctuaries is crucial for the Aeolian wall lizard's long-term survival and for reshaping its distribution.
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