Male and Female Cardinals sit together on a snowy rose bush. ID: 134881022 收藏 加入清单 下载版权Betty Shelton TIFF大小 41.1MB 格式JPG 编辑图片 以图搜图 大图:4888× 2937 像素·41.39 cm × 24.87 cm·300dpi·JPG 中图:1000× 601 像素·35.28 cm
Non-breeding gonadal testosterone production of male and female Northern Cardinals (Cardinalis cardinalis) following GnRH challenge. General and comparative endocrinology 174:370-378.DeVries MS, Holbrook AL, Winters CP, Jawor JM (2011) Non-breeding gonadal testosterone production of male and female ...
Over 3 years, we compared a comprehensive suite of visual signals in male and female Northern Cardinals (Cardinalis cardinalis) in a rural and an urban population. We predicted that urban birds would have enhanced carotenoid-based signals as they likely have access to more carotenoids from ...