Two species in which both sexes may be confused. Males are blue and females, brown.
The Ultramarine Grosbeak is a year-round resident. The Glaucous-blue Grosbeak is a summer visitor.

Glaucous-blue Grosbeak © Juan Carlos Ferreyra Sky blue © José Luis Merlo Ultramarine Grosbeak © Claudia Mon Dark blue © Cora Rimoldi

Glaucous-blue Grosbeak © J. Simón Tagtachian Bill differences. Thick black bill with white lower mandible. Ultramarine Grosbeak © Claudia y Tito Di Mauro Very thick black bill white only at the base.

Glaucous-blue Grosbeak © Jorge García Vicente Similar in colour. Bill differences as in males. Ultramarine Grosbeak © Roberto Ares