The Eastern “delicacy” Bird’s Nest Soup is a cruel dish made from the nests of real Asiatic birds, who suffer greatly during the harvesting process.
Bird’s nest soup, often hailed as the “caviar of the East”, is a dish steeped in cultural tradition and luxury hardly ever seen in the West. Made from the hardened saliva of swiftlets, this “delicacy” has been consumed for over a thousand years, particularly in China and Southeast Asia. However, beneath its veneer of opulence lies a tale of exploitation, environmental destruction, and animal suffering.
Bird’s nest soup is made from the nests of swiftlets, small birds native to Southeast Asia. Unlike most bird nests composed of twigs or leaves, swiftlets construct their nests entirely from their saliva, which hardens into a gelatinous structure. These nests are harvested from caves or specially constructed birdhouses and are then cleaned and processed into soup. The dish, often served with ingredients like rock sugar or ginseng, is celebrated for its purported health benefits such as improving skin elasticity, boosting immunity, and promoting longevity (another case of unproven health claims from animal-based Traditional Chinese Medicine, or TCM).
Bird’s nest soup has a rich history dating back over a thousand years. While some sources trace its origins to the Tang Dynasty (618-907 AD) in China, where it was considered a delicacy fit for emperors, others attribute its discovery to later periods. One popular legend suggests that Admiral Zheng He, a Chinese explorer during the Ming Dynasty (1368-1644), introduced bird’s nests to China after encountering them during his expeditions in Southeast Asia. However, another account credits a Siam-based Chinese man named Hao Yieng with the invention of bird’s nest soup around 1750. Regardless of its exact origins, bird’s nest soup quickly became associated with luxury, good fortune, and health benefits in Chinese culture. Over time, its popularity spread to other parts of Southeast Asia, including Indonesia and Malaysia. Initially reserved for royalty and the elite due to its rarity and labour-intensive harvesting process, bird’s nest soup has since become a prized delicacy and “health” food consumed worldwide. However, many people forget that behind this expensive dish, there is a nonhuman animal that has suffered — so, despite not containing any animal flesh, this is a cruel dish produced from animal secretions, which, like cow’s milk, vegans should avoid.
Who Are the Swiftlets?
Swiftlets, members of the tribe Collocaliini (family Apodidae), are remarkable birds whose lives intertwine with human exploitation through the bird’s nest soup industry. Comprising four genera — Aerodramus, Collocalia, Hydrochous, and Schoutedenapus — these aerial specialists inhabit tropical and subtropical regions.
Swiflets measure between 9 and 16 cm in length, weighing 8–35 grams. Their plumage has dull shades of black, brown, and grey, and they have narrow wings for rapid, gliding flight, as well as short legs for clinging to vertical surfaces. Aerodramus species use echolocation (audible clicks) to navigate dark caves. Swiftlets are obligate aerial feeders, capturing insects mid-flight with wide gapes and bristle-fringed beaks.
Swiftlets occupy fragmented ranges across southern Asia, Oceania, northeastern Australia, and the Indian Ocean. The Indian swiftlet (Aerodramus unicolor) is endemic to India and Sri Lanka, with populations concentrated in the Western Ghats and offshore islands like Burnt Island. Climate change projections suggest their future range may shrink to southern Western Ghats and Sri Lankan pockets. Other species, such as the Seychelles and Guam swiftlets, face extinction risks due to restricted island habitats. Being colonial cave-dwellers, swiftlets follow strict daily rhythms — mass exodus at dawn, return by dusk. Artificial “swiftlet houses” created by the bird’s nest industry mimic caves but disrupt natural behaviours.
Swiftlets are monogamous, and the breeding pairs exhibit high nest-site fidelity, breeding annually in the same spot. The breeding cycle spans 92–120 days, with two eggs per clutch. Both sexes incubate eggs in 24-hour shifts and jointly feed their chicks. They also show cooperative breeding or “egg-dumping” (laying eggs in others’ nests), possibly due to nest competition. Pairs regurgitate saliva to build cup-shaped nests over weeks, often under threat from rivals. Peak activity occurs pre-dawn and post-dusk.
The most commonly harvested species for bird’s nest soup are edible-nest swiftlets (Aerodramus fuciphagus), also known as the white-nest swiftlet, the Black-nest swiftlet (Aerodramus maximus), and the Indian swiftlet (Aerodramus unicolor). Aerodramus fuciphagus is considered the premier source of edible nests, as its nests are composed entirely of cemented saliva. The black-nest swiftlets (A. maximus and A. unicolor) also produce high-quality nests made solely from strands of gummy saliva. While other swiftlet species produce nests, those from the genus Collocalia are considered inferior quality due to the inclusion of other materials like moss and vegetation in their construction.
The Dark Side of Harvesting Swiftlets’ Nests
The process of harvesting these nests is inherently exploitative. Swiftlets build their nests as a safe space to lay eggs and rear their young. When these nests are taken prematurely — before eggs are laid or chicks have fledged — it disrupts the birds’ natural breeding cycle. In many cases, eggs or chicks are discarded during collection, leading to significant declines in swiftlet populations. Even when nests are harvested after chicks have left, the birds are forced to expend energy repeatedly rebuilding their homes.
The growing demand for bird’s nest soup has led to overharvesting and habitat destruction. Swiftlet populations have plummeted in many areas due to unsustainable practices. In some regions, populations have declined more than 70% over a few decades. Additionally, the construction of artificial birdhouses disrupts local ecosystems by altering swiftlet behaviour and encouraging over-reliance on human-managed environments.
Proponents of bird’s nest soup often tout its supposed health benefits, claiming it can rejuvenate skin, improve respiratory health, and even enhance fertility. However, scientific evidence supporting these claims is scant at best. Chemical analyses reveal that the nutritional value of bird’s nest soup is negligible compared to plant-based alternatives rich in collagen-boosting nutrients like fruits and vegetables.
The labour-intensive nature of nest collection also poses severe risks to human workers. Harvesters often scale treacherous cliffs or navigate dark caves using rickety ladders, leading to frequent injuries. Despite the high price tag associated with bird’s nest soup, the workers who risk their lives to collect these nests often receive minimal compensation.
Plant-based soups made with ingredients like agar-agar (a seaweed-derived gelatin substitute) can replicate the texture of bird’s nest soup while aligning with vegan principles.
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