Sightings:
Ushuaia, Argentina: 2014: November.
Isla Marta, Strait of Magellan, Chile, December 2016.
Notes:
There was a flock on an old boat in Ushuaia harbour, and a colony on an island in the Beagle Channel.
They have a forked tail with short steamers and are a large tern.
Like many terns they seem to take off for no reason!
Their red bill and legs make them striking in breeding plumage.
The upper bird in flight is a young bird as its bill is black and it has a white forehead. A non-breeding adult would have a red bill apparently.
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