Black-fronted terns breed only on the braided riverbeds of the eastern and southern South Island, in a dynamic habitat, and as a result they are threatened by a wide range of factors. These include habitat loss due to hydroelectricity development, weed encroachment of braided river breeding habitat, and recreational use of rivers. But the most significant impact is predation by introduced mammalian predators. The world global population is estimated between 5-10,000 individuals.
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Africa (entire continent rather than south of Sahara)
AN
Antarctica
AO
Atlantic Ocean
AU
Australasia (Wallacea (Indonesian islands east of Wallace's line), New Guinea and its islands, Australia, New Zealand and its subantarctic islands, the Solomons, New Caledonia, and Vanuatu)
PAL
Eurasia (Europe, Asia from the Middle East through central Asia north of the Himalayas, Siberia and northern China to Japan)
IO
Indian Ocean
LA
Latin America (Middle and South America)
MA
Middle America (Mexico through Panama)
NA
North America (includes the Caribbean)
NO
Northern oceans
OR
Oriental Region (South Asia from Pakistan to Taiwan, plus Southeast Asia, the Philippines, and Greater Sundas)
