title: Variation in the visceral characteristics of the willow ptarmigan (Lagopus albus) and common ptarmigan (Lagopus mutus) in the Taimir Peninsula.
mesh_terms: D000311:Adrenal Glands; D000367:Age Factors; D000818:Animals; D001717:Birds; D001921:Brain; D002432:Cecum; D014644:Genetic Variation; D006321:Heart; D007422:Intestines; D007668:Kidney; D008099:Liver; D009929:Organ Size; D010179:Pancreas; D010369:Pectoralis Muscles; D012621:Seasons; D012800:Siberia; D013154:Spleen; D013961:Thyroid Gland