Assertion: tern's subspecie | /r/HasProperty | endangered
Facets:
value: in 1985
type: TEMPORAL
value: federally
type: LOCATION
value: due to loss of habitat
type: CAUSE
value: in the united states
type: LOCATION
Source sentences:
text: Some tern subspecies are endangered, including the California least tern and the Easter Island race of the grey noddy.
text: The populations wintering in South America dropped by more than 50% from the mid-1980s to 2003 and the rufa subspecies is listed as federally Threatened in the United States.
text: The interior subspecies, with a current population of about 7000 pairs, was listed as an endangered subspecies in 1985 (estimated 1000 breeding pairs), due to loss of habitat caused by dams, reservoirs, channelization, and other changes to river systems.