The Butterfly Effect
Sparked by global warming and other forms of climate change, tropical butterflies are starting to arrive in Hong Kong and Taiwan in greater numbers, while temperate-zone species like the monarch appear to be dwindling in the region, conservationists told RFA. Seven new butterfly species were discovered in Hong Kong in 2021, including swallowtails, gray butterflies, and nymphs; most of them were tropical species.
But the changes are forcing out butterflies that need a temperate climate to breed in, experts said. Where once one saw tens of thousands of monarch butterflies spending the winter, as recently as 2013 and 2014, numbers have fallen sharply in recent years.
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