The adult male exhibits a dark-blue plumage with bright-blue upper-wings.

The ultramarine grosbeak is territorial; it doesn't fly in flocks.

They inhabit the edge of swamps, secondary forests and plantations.

The native range of these birds extends from Northeast and central Brazil, Bolivia, Paraguay to Argentina.

It takes place between September and February, builds its nest not far from the ground and each clutch usually has between 2 and 3 eggs.