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文献信息
Reproductive SuccessFood AvailabilityWillow Ptarmiganthe Great TitTerritorial BehaviorNESTInterspecific CompetitionBird SpeciesHabitat SelectionGreat TitFood SupplyBreeding PopulationNestling PeriodGreat TitsGreat Tit Parus MajorBird CommunitiesBreeding BirdsClutchForaging BehaviorSexual Dimorphism