Partial migration of White-winged snowfinches is correlated with winter weather conditions

摘要: Abstract Seasonal movements are a response to variability in resource availability and result from complex interaction between the behavioral physiological traits of species its prevailing environment. A widespread bird migration strategy is partial latitudinal migration, where some proportion population moves breeding winter grounds, while remaining individuals stay year-round on grounds. Deciphering how why migrate others essential understanding community structure dynamics. Little known about drivers strategies high-mountain birds that subjected strong seasonal environmental fluctuations count among most threatened by climate change. In this study, we investigated migratory pattern an alpine songbird, White-winged Snowfinch (Montifringilla nivalis nivalis), through analysis stable hydrogen isotopes feathers (δ2Hf), it relates weather factors. First, values δ2Hf were used assess probability snowfinches wintering Spanish Pyrenees Cantabrian Mountains have origin Alps. Second, analysed whether conditions (ambient temperature precipitation) Alps may play role towards southern Overall, ca 98% 86% sampled Mountains, respectively, likely originate populations Snowfinches also had higher propensity for large-scale South winters average monthly was particularly low Alps, typically