Scarlet-rumped Tanager

The scarlet-rumped tanager is a medium-sized passerine bird. This tanager is a resident breeder in the Caribbean lowlands from southern Mexico to western Panama. This species was formerly known as the scarlet-rumped tanager, but was renamed to Passerini's Tanager after Carlo Passerini, a professor at the Museum of Zoology of the University of Florence, when the distinctive form found on the Pacific coast of Costa Rica and Panama was reclassified as a separate species, the Cherrie's tanager, Ramphocelus costaricensis. While most authorities had accepted this split, there were notable exceptions. It was renamed back to the scarlet-rumped tanager in 2018 when Cherrie's Tanager was lumped back into the species.

Source: Wikipedia