Summary[edit] Description: Español: Atí o gaviotín de pico grande en Rio Cuiabá - MT - Brasil English: Large-billed Tern at Cuiabá river - MT - Brazil Português: Trinta-reis-grande em Rio Cuiabá - MT - Brasil. Date: 5 July 2012, 12:26:16. Source: Own work. Author: Hector Bottai.