title: Biological timing: sheep, Dr. Seuss, and mechanistic ancestry.
abstract: For many animals, knowing the time of year and predicting the forthcoming season is crucial for their survival and that of their offspring. Recent research sheds light on hormonal mechanisms that perform this calendar function in birds and mammals.
authors.affiliation: Department of Integrative Biology and Helen Wills Neuroscience Institute, University of California, Berkeley, California 94720, USA. gb7@berkeley.edu
authors.forename: George E
authors.initials: GE
authors.lastname: Bentley
mesh_terms: D000818:Animals; D008550:Melatonin / Q000502:physiology; D017440:Photoperiod; D011784:Quail / Q000502:physiology; D012098:Reproduction / Q000502:physiology; D012621:Seasons; D012756:Sheep / Q000502:physiology*; D015398:Signal Transduction; D013045:Species Specificity; D013963:Thyroid Hormones / Q000502:physiology
chemical_list: D013963:Thyroid Hormones; D008550:Melatonin