Cabot's Tern occurs along the Atlantic coast of South America. At the Cardos Island breeding colony in Brazil, adults were studied carrying fish and other food to chicks. The black bill with a yellow tip describes breeding adults of the nominate subspecies, T. a. acuflavidus.
Breeding adults of the nominate subspecies, T. a. acuflavidus, have pale grey upperparts, white underparts, and a black crest. Their bill is black with a yellow tip.
At the Cardos Island breeding colony in Brazil, adults were observed carrying fish and other food to chicks and females.
An extinction-risk assessment has not been added yet.