According to Wikipedia: "In 1977, Costa Ricans chose the yigüirro as a national symbol (over many much more colorful birds that inhabit the country) due to its strong and melodious song that always comes during the start of the rainy season. In addition, unlike many of the forest songsters of Costa Rica, the present bird has been familiar to the general population since the country's early history, thanks to the species' tendency to live near houses and settlements."
The new print available on my Etsy shop is a Baltimore Oriole, named after Lord Baltimore because, apparently, the bird's colors were reminiscent of his family crest... Hm.