Changes in the timing of bird migration are becoming ever more pronounced—trends underscored by a recent scientific study that used climate data and community science observations to model how migrating birds respond to shifting climatic cues. The research found that climate variables like temperature and precipitation strongly influence when and where migratory songbirds are recorded on eBird checklists, and that projected future climate patterns could meaningfully alter the probability of seeing many species during spring migration. These shifts mirror the concerning trend of earlier arrival and diminished abundance of birds that many birdwatchers are already noticing in their own backyards.
Studies like this show the value of community science to understand these concerning signals of climate-driven change. Submitting eBird checklists that demonstrate when birds first arrive in the spring (or installing a Haikubox which will automatically track every species’ arrival) provide data that scientists can use to track and model changing migration patterns. Whether you’re spotting warblers at your favorite park, counting sandhill cranes at sunrise, or checking your daily list of Haikubox identifications, your observations contribute to a continental picture of how climate change is reshaping the rhythms of bird life.