Abstract:The effect of climate change on the timing of bird migration is a hot topic in avian ecology. We used the bird banding method to analyze differences in the spring migration timing of two bird species in Qinhuangdao, Hebei Province from 2010 to 2019 (Fig. 1), and further discussed the reasons for the differences. We selected the insectivorous Yellow-browed Warbler (Phylloscopus inornatus) and granivorous Black-faced Bunting (Emberiza spodocephala) as the target species, and analyzed the changes of migration timing and their correlations in collected individuals with banding numbers. Advanced migration timing, including arrival date, peak periods, and departing date, and shortened residence days were found for these two migratory birds (Fig. 2, Fig. 3), and there were positive correlations between arrival and departing dates of the Yellow-browed Warbler (Table 1, Table 2). We suggest that the earlier growth and development of vegetable and insect food sources for these migratory birds facilitated their earlier arrival. In recent years, Yellow-browed Warblers have arrived in and departed earlier from Qinhuangdao; therefore, they should have arrived at their breeding sites earlier and possibly beneficial for their breeding success and survival rates.