Passerini's Tanager Ramphocelus passerinii, is a resident in the Caribbean lowlands from southern Mexico to western Panama. This species was formerly known as the Scarlet-rumped Tanager, but was renamed 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.
This species was named for Carlo Passerini a professor at the Museum of Zoology of the University of Florence.

As discussed under Cherrie’s Tanager, the male Passerini’s and male Cherrie’s are identical. Only the females are different. The female Passerini’s lacks the bright orange breast of rump of the Cherrie’s. It is instead a much paler orange. As shown in the different females the plumage can vary.

Hese were photographed at the Peace Lodge, Selva Verde Biological Station, Cano Negro, Arenal and Rancho Naturalista.

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