title: Relationship between the sexual activity of capercaillies and their morphological and physiological characteristics.
mesh_terms: D000818:Animals; D001699:Biometry; D001717:Birds / Q000033:anatomy & histology / Q000502:physiology; D001835:Body Weight; D005260:Female; D008297:Male; D009929:Organ Size; D012726:Sexual Behavior, Animal