evidence: In addition, ectoparasites were collected for qualitative analysis, tissue and organ samples were taken for the Banco Nacional de Amostras de Albatrozes e Petréis (Brazilian Albatross and Petrel Sample Bank), and back and breast feathers for trace element analysis. The gastrointestinal content indicated no debris in the esophagus, pro-ventricle, ventricle, and intestine cavities. Cephalopod beaks were found in the proventricle (n = 1) and ventricle (n = 12); these were identified as three upper and eight lower beaks, from eight different specimens, of which two were Histioteuthis sp. There was no subcutaneous fat, and pectoral musculature was slightly thick, especially the supracoracoideus muscle, which was very slim, consistent with an emaciated specimen. The complete skeleton, primaries, and rectrices are deposited at the Museu de Ciências Naturais, Universidade Federal do Rio Grande do Sul, Imbé, Rio Grande do Sul, registration number MUCIN 1075. Separation of Great-winged Petrel from dark-morph Trindade Petrel