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Federico Riva on Why Butterfly Decline Is a Canary in Canada's Coal Mine
Butterfly population decline is measurable, documented, and connected to something most people eat every day. Federico Riva of Carleton University helped lead a global analysis to figure out how bad it actually is.
The UK has been counting butterflies since 1976. North America and Europe show clear declining trends. The tropical world is largely unmapped. Riva's global collaboration, built with researchers from every major continent, found that understanding where declines are happening and why is the first step. Habitat loss, he says, needs to be reversed now.
Canada's Boreal Forest ranks…
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