This article is the fourth in a series about “The Pioneers“, the naturalists in 19th and early 20th century China who shone a light on China’s natural heritage.
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For decades, the study of China’s natural wonders was a story written by outsiders – European missionaries, consuls, and customs officers who ventured into the country’s interior and sent their discoveries back to museums in Paris, London, and Berlin. But it was a soft-spoken scholar from Fuzhou, a man who earned his PhD from the University of Michigan at just 23 years old, who would fundamentally transform Chinese ornithology. Tso-hsin Cheng (郑作新, 1906–1998) did not merely study China’s birds – he reclaimed the study of them for China itself, becoming the founder of modern ornithology and zoogeography in his homeland.
The Boy Who Would Be a Bird
Tso-hsin Cheng was born in Fuzhou, Fujian Province, on 18 November, 1906. When he was only five years old, his mother died. His father, employed in the salt administration, was away from home year-round, and the task of raising young Tso-hsin fell to his grandmother.
There is a charming story from this time.
In the evenings, as Tso-hsin’s grandmother worked by lamplight, she would tell him stories. The one he loved best was an ancient myth from the classic Chinese text Shanhai jing (Chinese: 山海经), a compilation of mythic geography and beasts that may have existed since the 4th century BCE. “Jingwei Determines to Fill the Sea” tells the story of a bird in Chinese mythology, who was transformed from the Flame Emperor’s daughter Nüwa after she drowned when playing in the Eastern Sea. She metamorphosed into a bird called Jingwei. Jingwei is determined to fill up the sea, so she continuously carries a pebble or twig in her mouth and drops it into the Eastern Sea. In the story, Jingwei has a dialogue with the sea where the sea scoffs at her, saying that she won’t be able to fill it up “even in a million years”, whereupon she retorts that she will spend ten million years, even one hundred million years, whatever it takes to fill up the sea so that others would not have to perish as she did. “Unceasingly the bird carried, unceasingly it worked,” his grandmother would say. “Tell me, wasn’t the Jingwei bird’s determination immense? Its perseverance immense?” Tso-hsin listened, transfixed.
One evening, after hearing the story yet again, young Tso-hsin looked up at his grandmother with tears in his eyes and said, “When I grow up, I want to be a Jingwei bird too.” His grandmother nodded, threading her needle. “Whatever you do in life,” she told him, “you must press forward like the Jingwei bird, overcoming every obstacle with unyielding determination”. The boy nodded solemnly and helped his grandmother thread her needle when her eyes grew dim.
From that day, something changed in him. He would not stop his schoolwork until it was finished. He would not rest until the water jar was filled. The Jingwei bird’s spirit had taken root.
From Fujian to Michigan and Back
Cheng Tso-hsin’s intellectual gifts emerged early. In 1926, he graduated from Fujian Christian University (later Fujian Normal University) and, in the same year, sailed for the United States of America to pursue advanced study. He enrolled at the University of Michigan, earning a master’s degree in 1927 and a PhD in 1930 – at the astonishing age of 23. The university awarded him its prestigious “science key” in recognition of his achievements.
America offered bright prospects. Yet Cheng made a decision that would define his life’s work: he rejected lucrative offers and returned to China. He took up a professorship at his alma mater, Fujian Christian University, where he would teach for the next two decades, serving as chair of the biology department, then dean of the College of Sciences, and eventually academic dean.
Building a Foundation in Chinese
Upon his return, Cheng confronted a stark reality: there was almost no biological literature available in Chinese. The foundational texts, the laboratory guides, the taxonomic references – all were in Western languages, inaccessible to most Chinese students. So Cheng set about creating them himself.
Between 1933 and 1938, he wrote University Laboratory Exercises in Zoology, Vertebrate Taxonomy, and General Biology entirely in Chinese. These became standard texts in universities across the country. He also founded the Fujian Christian University Biological Bulletin in 1938, providing an outlet for Chinese-language research. This was not merely translation work; it was intellectual nation-building – creating, almost from scratch, the vocabulary and conceptual framework for Chinese biologists to work in their own language.
The Shaowu Years: China’s First Field Ornithology
While building an academic program, Cheng also built a research agenda. From 1938 to 1941, despite limited funding, he led students on systematic field surveys in the mountains around Shaowu in northwestern Fujian. This was groundbreaking work: the first sustained, quantitative study of wild bird populations conducted by Chinese scientists. Cheng documented not merely which species occurred there, but their relative abundance, seasonal movements, and breeding status.
The result, “A Report for Three Years’ Field Survey of Birds in Shaowu,” published in 1941, was a landmark. It demonstrated that Chinese scientists could conduct ornithological research at the highest level, and it laid the foundation for everything that followed.
Claiming the Checklist
In 1945, Cheng was invited back to the United States as a visiting professor by the State Department’s cultural division. He used the opportunity to visit major American museums, examining their Chinese bird collections and consulting with curators. When he returned to China in 1946, he brought back not just knowledge, but a mission.
In 1947, Cheng published two papers that would reshape the field. The first was the “Checklist of Chinese Birds” in the Transactions of the Chinese Association for the Advancement of Science. It listed 1,087 species and 912 subspecies – the first comprehensive checklist compiled by a Chinese ornithologist. The second was “On the Geographical Distribution of Birds in China,” which proposed a new framework for understanding avian zoogeography.
Drawing the Line: China’s Zoogeographical Regions
Cheng’s distribution paper was revolutionary. He divided China’s avifauna into two great zoogeographical realms – the Oriental realm of the tropics and subtropics, and the Palearctic realm of the temperate north – and proposed a boundary between them. This line began at the eastern edge of the Himalayas, followed the Qinling Mountains, continued along the Dabie Mountains, crossed the Yangtze River, and ended in the hills of Fujian and Zhejiang.
This was not merely an academic exercise. Understanding where species occur and why has profound implications for conservation, evolutionary biology, and biogeography. In 1956, Cheng and his colleague Zhang Rongzu refined this framework, publishing the first comprehensive scheme for China’s zoogeographical regions: two realms, seven regions, and sixteen subregions. The Qinling Mountains, they argued, formed the true boundary between north and south – a revision of earlier schemes that had placed the divide at the Nanling Mountains. This regionalisation has been recognised worldwide as a fundamental framework for understanding China’s biodiversity.
The Sparrow Controversy
Cheng’s scientific judgment was not confined to academic journals. In the 1950s, during the Great Leap Forward, the Chinese government launched a campaign to eliminate pests, including sparrows, which were blamed for consuming grain. Millions of people were mobilised to bang drums, wave flags, and chase the terrified birds until they dropped from exhaustion.
Cheng spoke out. At a meeting of the China Zoological Society, he argued that the situation was more complex: although sparrows did eat grain in winter, during the breeding season sparrows fed their nestlings insects – many of them agricultural pests. The goal should not be extermination, but control of harm. He and his colleagues conducted field research and published their findings in the People’s Daily and other newspapers. The campaign was eventually called off, though not before immense ecological damage had been done. It was a rare example of scientific evidence influencing policy during a tumultuous era.
A Lifetime of Systematics
Over his long career, Cheng and his colleagues described 16 new subspecies of birds. He studied the evolution and phylogeny of pheasants, laughing thrushes, and other groups. His work on the silver pheasant (Lophura nycthemera) was particularly notable: comparing the distribution and morphological variation of 14 subspecies, he found that more primitive forms occurred at the periphery of the range, not the centre. He proposed a “competitive exclusion” hypothesis to explain this pattern, an idea consistent with Darwinian concepts of species competition.
In 1978, Cheng led the publication of the first volume of the Avian Fauna Sinica, a monumental series that would eventually cover the birds of China in exhaustive detail. He edited multiple volumes himself and served as deputy editor-in-chief of the entire Fauna Sinica project. His 1987 work, A Synopsis of the Avifauna of China, published simultaneously in Beijing and Hamburg, was an encyclopaedic monograph covering 1,186 species, with detailed information on nomenclature, distribution, habitat, and population status for each. It is regarded as one of the classics of world ornithological literature.

Honours and Recognition
The scientific world took note. In 1980, Cheng was elected a member of Academia Sinica (now the Chinese Academy of Sciences). In 1988, the National Wildlife Federation of the United States awarded him its “Special Conservation Achievement Award” – the first time the organisation had honoured a scientist outside America. The citation praised him as “the outstanding leader in the field of Chinese ornithological research, whose extensive knowledge has attracted worldwide attention”.

He served as vice-president, president, and lifetime honorary president of the World Pheasant Association; as a consultant to the International Crane Foundation; and as honorary chairman of the 22nd International Ornithological Conference. He was a founder of both the China Zoological Society (1934) and the China Ornithological Society (1980), serving as the latter’s first chairman. He received China’s National Natural Science Award, the Chinese Academy of Sciences Natural Science Award, and numerous other honours.
A Lasting Legacy
In 1994, Cheng donated his prize money to establish the “Cheng Foundation for Ornithological Science” to encourage young scholars to pursue careers in ornithology. To date, 28 awardees have been honoured, and many have become leading ornithologists in China and internationally.
Cheng passed away in Beijing on June 27, 1998, at the age of 91. But his name lives on in an unexpected way. In 2015, an international team of scientists led by Per Alström and Lei Fumin described a new bird species from the mountains of central China. It was a small, brown warbler with a buzzy, insect-like song – the very bird that had puzzled Alström on a visit to Sichuan in 1992. Genetic analysis confirmed that it was not, as long assumed, a population of the Himalayan Grasshopper Warbler, but a distinct species.
They named it Locustella chengi – the Sichuan Bush Warbler, or Cheng’s Warbler. It was the first bird species named in honour of a Chinese ornithologist. Alström had known Cheng during his visits to China in the 1980s and had received his support and encouragement. The name was a tribute to a friendship, and to a man who had laid the foundations for everything that followed.
Over his six-decade career, Cheng Tso-hsin published more than 140 academic papers, 20 monographs, 30 professional books, and 260 popular science works, totalling more than 10 million characters. He did not merely study China’s birds. He trained the generation that would succeed him. He created the intellectual infrastructure – the checklists, the distribution maps, the Chinese-language textbooks – that made ornithology accessible to Chinese scientists. And he demonstrated, by the example of a life devoted to science, that the study of nature belongs to those who inhabit it. The birds of China had found their champion.
References:
- Alström, P., et al. (2015). Integrative taxonomy of the Russet Bush Warbler Locustella mandelli complex reveals a new species from central China. Avian Research, 6(1), 9. (Source for the naming of Locustella chengi).
- Chinese Academy of Sciences. (n.d.). Cheng Tso-hsin. Academician database. Retrieved from academic website. (Source for election to Academia Sinica in 1980).
- Cheng, T. H. (1941). A report for three years’ field survey of birds in Shaowu. Fukien Christian University Biological Bulletin, 1, 1-124. (The landmark Shaowu study).
- Cheng, T. H. (1947a). Checklist of Chinese birds. Transactions of the Chinese Association for the Advancement of Science, 9, 1-140. (The first comprehensive checklist by a Chinese scientist).
- Cheng, T. H. (1947b). On the geographical distribution of birds in China. Biological Bulletin of Fukien Christian University, 5, 1-28. (The original zoogeographical framework).
- Cheng, T. H. (1976). The Birds of China. Science Press, Beijing. (A precursor to the synopsis).
- Cheng, T. H. (1987). A Synopsis of the Avifauna of China. Science Press, Beijing, and Paul Parey Scientific Publishers, Hamburg. (The encyclopaedic monograph, cited as a classic).
- Cheng, T. H., & Zhang, R. Z. (1956). On the zoogeographical regions of China. Acta Geographica Sinica, 22(1), 93-110. (The refined regionalisation scheme).
- Cheng, T. H., et al. (Ed.). (1978-1998). Avian Fauna Sinica (Vols. 1-2). Science Press, Beijing. (The monumental series).
- China Ornithological Society. (n.d.). History of the China Ornithological Society. Retrieved from society website. (Source for founding dates and Cheng’s chairmanship).
- Fan, F. (2004). British Naturalists in Qing China: Science, Empire, and Cultural Encounter. Harvard University Press. (Background on foreign naturalists in China).
- Fujian Normal University. (n.d.). Prominent Alumni: Cheng Tso-hsin. Retrieved from university archives. (Source for early life and education in Fuzhou).
- Li, Z. (2008). A Study on Cheng Tso-hsin’s Ornithological Research [Master’s thesis]. Nanjing Agricultural University. (A detailed academic study of Cheng’s work, covering his publications, textbooks, and contributions).
- National Wildlife Federation. (1988). Citation for Special Conservation Achievement Award. (Source for the award and its wording).
- University of Michigan. (n.d.). Notable Alumni: Tso-hsin Cheng. Alumni Association records. (Source for degrees, “Golden Key,” and early career).
- Wang, Z. J. (2010). Reminiscences of Professor Cheng Tso-hsin. Chinese Journal of Zoology, 45(2), 173-175. (Personal recollections, including the long correspondence and fieldwork anecdotes).
- World Pheasant Association. (n.d.). History and Honorary Presidents. Retrieved from association website. (Source for his leadership roles).
- Xu, W. (1999). In memory of Professor Cheng Tso-hsin (1906-1998). Ibis, 141(2), 341-342. (Obituary and career summary).








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