Bay Wren (Thryothorus nigricapillus costaricensis) Seven subspecies are recognized with only subspecies costaricensis mapped for Costa Rica. This loud and persistent vocalist was still hard to find and even harder to get a clear picture of. Sexes similar. We stood meters away from it with it singing on numerous occasions without even getting a glimpse of it (frustrating). Photographed near Buenos Aires, Cordillera de Guanacaste, north-slope of Rincon de La Vieja Volcano, Caribbean-slope, Costa Rica. Lower montane cloud forest at ca. 650 m (2,133 ft) elevation.