This is one of two or three different ” seed eater type” birds that I see around my house, especially in the cow pasture across the street where this one is. See more of my photos of this species in my gallery Blue-black Grassquit (linked) where the last two images were made on my first trip to Costa Rica in 2009. Or read about them on eBird or on iNaturalist.
Shot was made from my terrace zooming in on the fence across the street. 🙂
¡Pura Vida!