This one on the Caribbean side has an identical male as the Pacific side male with a slightly different female and they are thus considered different subspecies. I keep my photos separated in two galleries. For more of these from the Caribbean Slope, see Scarlet-rumped Tanager, Passerini’s (my gallery link) and yes, when I first came to Costa Rica these were call Passerini’s Tanager, while the ones on the Pacific side were called Cherrie’s Tanager. If you want to see if you can tell the difference in the two females, check out the other gallery: Scarlet-rumped Tanager, Cherrie’s (linked). And note that some sources say that the difference is seen only in the immature birds! 🙂 It is also interesting that some sources also say that the Cherrie’s is found only in Costa Rica and thus the scientific name includes the Latin “costaricensis.” 🙂 In my photos it seems that the Pacific side females are slightly darker in color with no other differences to me and I have never been where I could compare immature ones. These two photos are both male.
¡Pura Vida!