Andean Hillstar (Oreotrochilus estella subsp. stolzmanni) Species is sexually dimorphic. male. Cordillera Blancas, northeast of Yungas, Huascarn National Park, northeast of Yungay, Ancash, Per. Above the second Laguna Llanganuco at Yuraq Corral. At the edge of overgrazed puna grassland valley floor and the edge of the mountain slope at ca. 3,863 m (12,674 ft).