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Reflecting on 70 years in field, pioneer laments fate of once-plentiful butterflies

TAIPEI--Chen Wei-shou, a pioneer of Taiwan butterfly research, remembers being spellbound when as a boy of 6 he first saw “a flower that could move.” A lifelong obsession had begun.

Now aged 81, Chen can look back at a long career that has spanned seven decades and 77 books and has culminated in the establishment of one of Asia's largest butterfly museums.

By any measure, his academic life has been successful — and yet, when he looks back, his recollections are tinged with sadness, as butterflies that were once abundant have become rare in many parts of Taiwan.

In some parts of Taiwan, Chen said, butterfly populations are now one hundredth of the level before industrialization.

“Taiwan used to be a paradise of butterflies. When I was a kid, one could easily spot butterflies even in Taipei,” Chen said.

Times have changed, and now one of the only places to see butterflies in Taiwan's capital is at the museum he set up in 1972 on the campus of Cheng Kung High School, where he taught for a generation until retiring in 1996.

Taiwan's butterfly habitats were destroyed with breathtaking speed as the society transformed itself from an agricultural society to an industrial powerhouse in the post-war years.

“A lot of original forest was cleared out to make way for roads, homes and factories, and for the development of farmland,” said Lin Kuo-chang, an official with the Council of Agriculture.

“The widespread use of pesticides by farmers was also responsible for the massive disappearance of butterflies on the island.”

Especially the plains along the west coast of Taiwan, where the island's economic miracle was forged, saw populations drop precipitously and became what Chen termed “a butterfly desert.”

The 'Butterfly Kingdom'

But there was also another reason why butterfly populations came under pressure from the 1950s to the 1970s.

Families across the island found a new source of income, either catching butterflies or working in processing plants turning them into decorations that were shipped in one of the island's great export successes of the boom years.

At the peak of the industry, Taiwan exported 30 million butterflies a year, especially to Japan, but also the United States and Europe.

Hard trade statistics are difficult to come by, but thousands of Taiwanese derived their entire income from butterflies for years.

“Taiwan sold so many butterflies and butterfly products that the island ended up being called the butterfly kingdom,” Chen said. “Whether you like it or not, it supported many families.”

Nearly one in five butterfly species can only be found in Taiwan, but concern about their survival is mounting.

For one species — the great purple spot butterfly — the concern comes too late, and it has already become officially extinct in Taiwan.

Three others — the Broad-tailed Swallowtail, Magellan's Iridescent Birdwing and the Great Purple Emperor — are now on the endangered list and subject to active conservation efforts.

In one of many signs of the newfound concern, authorities have created butterfly sanctuaries and are trying to raise awareness in information campaigns.

And every spring, they shut one lane of a busy road in central Taiwan to protect millions of purple-spot butterflies on their seasonal migration.

Chen, for one, has replaced his nets with cameras. His first documentary, titled “Dancing Queens of the Nature,” scooped the coveted “Golden Harvest” award in 1978, and since 1981, the only butterflies he has caught are the ones caught on film.

“My collection of specimens had exceeded the museum's capacity. Besides, I felt I had collected almost every species that could be discovered in Taiwan,” he said.

“Butterflies helped Taiwan survive a difficult period. Now Taiwan people should do something in return for the sacrifices made by the butterflies.”

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This Sept. 4 photo shows respected entomologist Chen Wei-shou, 81, using a man-made butterfly to brief visitors at the insect museum of Taipei's Cheng Kung Senior High School. The museum, the embodiment of Chen's lifelong devotion to the academic field, houses 60,000 butterflies and insect specimens, including 5,000 species from the island and abroad.

(AFP)

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