Marco Aurélio Crozariol

Resolving the mystery of Cyanerpes (Thraupidae) ‘black eggs’, with notes on the breeding and exaggerated displays of Hypocnemoides antbirds (Thamnophilidae)

Between the end of the nineteenth and the middle of the twentieth centuries intermittent reports of ‘black eggs’ belonging to one or more species of Passeriformes in South America were usually attributed to small-bodied tanagers of the genera Cyanerpes and Chlorophanes. Doubts co...