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Spring migration has officially begun. Millions of birds leave their winter homes to fly across vast distances. They travel to reach specific breeding grounds where they will raise their young. However, the world they return to is changing rapidly. Rising global temperatures and shifting seasons force birds to adjust their schedules. They must decide when to leave and how to navigate a warming climate. This adjustment is extremely difficult. Many species rely on precise timing to survive. If they miss the right moment, they may not reproduce successfully.
Morgan Tingley is a professor of ecology and evolutionary biology at the University of California, Los Angeles. He studies how climate change affects bird populations. His research highlights a growing disconnect between birds and the environments they depend on. The Conversation collaborated with SciLine to share highlights from Tingley’s discussion. These insights explain why earlier springs are creating a crisis for many species.
Morgan Tingley explains that spring migration is a complex journey. Birds travel north across the United States. They reach areas where they spend their spring and summer months. Their primary goal is to arrive at their breeding grounds at a very specific time. They need to build nests and lay eggs when food is most abundant. In nature, this peak food supply usually occurs in early summer. It is often provided by insects or plants that bloom at that exact moment.
Climate change is disrupting this delicate balance. Springs are starting earlier each year due to rising global temperatures. This shift creates a serious problem for migrating birds. Many birds are arriving at their breeding grounds too late. They are falling behind the local pace of spring. Consequently, they miss the peak window of food availability. By the time they arrive, the insects they need to feed their chicks may have already disappeared.