Francis’s gorgeous sapphire — a new-to-science species of butterfly — has just been described in the high-altitude evergreen forests of western Angola. The identification of Iolaus francisi, with its shimmering blue upper wings bordered with black, and silvery underwings patterned with orange and brown lines highlights once more the rich biodiversity of the country’s most threatened habitat. Ecologist Alan Gardiner recalls the exciting moment he and Zimbabwean lepidopterists (butterfly experts) Jonathan Francis and Shabani Ndarama first saw a male sapphire shining in a forest patch during an expedition to the Namba Mountains in Cuanza Sul province in May 2023. “It’s always special when you see something like that,” says Gardiner, head of applied research at the South African Wildlife College. “It’s so much more vivid than you can get in a picture.”   Described recently in the journal Zootaxa, Francis’s gorgeous sapphire is now one of 13 unique butterflies known only from this region. Its caterpillars feed on the leaves of Phragmanthera mistletoes and mimic the hairy buds growing on the stems. Francis had collected two caterpillars of the butterfly in the Namba Mountains during an earlier trip in October 2022. He reared them back home in Zimbabwe, feeding them on the leaves of mistletoe plants he had cultivated in his Harare garden years earlier. “If I didn’t have the [mistletoe] leaves, I would have lost them.” The butterflies that emerged were both females, with distinctive undersides bearing an extra stripe that no other Iolaus butterflies have, he says. But…This article was originally published on Mongabay

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