Chinese Crested Tern
Thalasseus bernsteini
中华凤头燕鸥
Introduction
The black-faced tern is one of the world's critically endangered tern species. It was presumed extinct before its rediscovery in 2000. Fewer than 50 individuals are believed to exist globally. The species inhabits the waters and coastlines of eastern Asia, breeding on small rocky islets and spending winters in warmer southern waters. It nests within colonies of the greater crested tern. The species is identified by its yellow bill with a black tip. The primary breeding site is located in the Matsu Islands. Sightings have occurred in the Philippines, and a breeding colony was discovered in South Korea in 2016.
Description
A medium-large tern measuring 38-43 cm in length, this species presents a graceful silhouette typical of the crested tern group. In breeding plumage, it sports a complete black crown contrasting with a pale, silvery-grey back and wings. The underparts are white, as is the forked tail. The most distinctive feature is the stout bill, which is yellow with a black tip—a pattern reversed from the similar Sandwich tern. Close observation reveals a small white point at the tip of the bill. Non-breeding plumage retains the grey upperparts but shows reduced black on the head. The legs are dark. When perched among greater crested terns, its notably smaller size and differently patterned bill become apparent.
Identification
The key to identifying this species lies in careful attention to bill pattern and structure. Unlike the Sandwich tern's yellow bill with black tip (which this bird superficially mimics), this species has a stouter bill. The yellow base is extensive with a black tip, and the bill appears more robust. From the lesser crested tern, which overlaps in wintering areas, it differs in having a white rump and paler grey mantle, plus the distinctive black tip on the stouter bill. The closest relative, the greater crested tern, is noticeably larger with an entirely yellow bill, a white forehead in breeding season, and a much darker grey mantle and rump. Most reliable field marks are the stout, yellow-and-black bill and the relatively pale upperparts.
Distribution & Habitat
This species breeds almost exclusively on a single islet in the Matsu Islands, a Taiwanese-administered territory off Fujian Province, China, where four pairs were rediscovered in 2000. The islands' disputed political status and military restrictions have inadvertently protected the colony, which has since been designated a wildlife sanctuary. Historically, the species bred along the entire Chinese coast north to Shandong Province. Wintering birds migrate south to the Philippines, with recent records from Davao del Norte, Davao City, and Lingayen Gulf. Single birds have been recorded in southern Taiwan near the mouth of the Pachang River. A 2025 sighting in Sarawak, Malaysia, marked the first confirmed record there since 1913. The total population is estimated at fewer than 50 individuals.
Behavior & Ecology
This tern nests within colonies of greater crested terns, adopting similar breeding behaviors. The species presumably feeds on small fish and marine invertebrates in coastal and inshore waters, typical of crested tern foraging strategies. Courtship displays likely involve ritualized flight patterns and fish offerings common to terns. Eggs are laid in simple ground scrapes among vegetation or on bare rock. The species is migratory, with the entire population moving south to Philippine waters for the non-breeding season. Like other terns, it is vocal at the breeding colony, though specific call descriptions are not well documented in available literature.
Conservation
The species holds a critically endangered IUCN assessment, having been presumed extinct until its rediscovery in 2000. The world population is estimated at fewer than 50 birds, down from approximately 100 in 2004. Primary threats include illegal egg collection for food, typhoons that can destroy nesting colonies, and disturbance from fishermen accessing nesting islets. Hybridization with the greater crested tern poses a genetic threat. Conservation actions have focused on protecting the Matsu Islands colony, though enforcement remains challenging. The discovery of a breeding colony in South Korea in 2016 was a significant positive development, potentially expanding the species' range. Without continued protection, extinction within five years was predicted in 2007, underscoring the urgency of conservation measures.
Culture
The species holds official status as the county bird of Lienchiang County, also known as Matsu Islands, where the entire known global population breeds. This designation reflects local pride in harboring one of the world's rarest seabirds. Beyond this symbolic recognition, there is no extensive folklore or traditional cultural significance documented in available sources. The species' rarity and recent rediscovery have instead generated significant attention in scientific and conservation circles, positioning it as an emblem of seabird conservation efforts in the region.
Source: Wikipedia · CC BY-SA 3.0
Taxonomy
- Order
- Charadriiformes
- Family
- Laridae
- Genus
- Thalasseus
- eBird Code
- chcter2
Distribution
breeds very locally islets off coastal eastern China and southwestern South Korea; winter range poorly known but mainly coastal southeastern China, Taiwan, northern Philippines, and coastal Seram (southern Moluccas); very rare
Data Sources
Species description from Wikipedia, licensed under CC BY-SA 3.0.
Bird images and sounds sourced from GBIF, contributed by citizen scientists worldwide under Creative Commons licenses.
Taxonomy data from AviList 2025.