SleepSleep, REMBirdsSleep DisordersMammalsSleep Apnea, ObstructiveWakefulnessPolysomnographySleep Apnea SyndromesSleep Initiation and Maintenance DisordersREM Sleep Behavior DisorderElectroencephalographyArousalDreamsElectrooculographyCircadian RhythmNarcolepsySleep StagesPasseriformesAnimal MigrationSongbirdsActigraphySleep Apnea, CentralDisorders of Excessive SomnolenceSleep Disorders, IntrinsicElectromyographySleep BruxismSleep ParalysisPonsAnimals, WildFeathersTime FactorsCharadriiformesDelta RhythmSleep Medicine SpecialtyPhylogenyFlight, AnimalCataplexySpecies SpecificitySnoringChickensNocturnal Myoclonus SyndromeSleep Arousal DisordersPsittaciformesBiological EvolutionReptilesSleep DeprivationREM Sleep ParasomniasVocalization, AnimalMelatoninContinuous Positive Airway PressureParrotsAnseriformesAnalysis of VarianceFinchesGalliformesBehavior, AnimalRaptorsNesting BehaviorMolecular Sequence DataSparrowsFalconiformesQuestionnairesBody TemperatureHypnotics and SedativesBeakRespirationMarsupialiaFeeding BehaviorColumbidaeFossilsBrainDucksTegmentum MesencephaliSeverity of Illness IndexEvolution, MolecularReticular FormationGeeseFatigueActivity CyclesHabitsCloacaPoultry DiseasesSeasonsEcosystemCrowsBody SizeBird Fancier's LungRodentiaRestless Legs SyndromeSleep-Wake Transition DisordersOrexin ReceptorsBrain WavesMonomeric GTP-Binding ProteinsPedunculopontine Tegmental NucleusDinosaursVertebratesSpheniscidaeAmino Acid SequencePhotoperiod