Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan
Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan

Butterfly numbers dip at key Tuen Mun site in Hong Kong

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Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan
Sightings of danaidae butterflies, including the common tiger, were down over winter. Photo: Martin Chan
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