Birds Are Laying Eggs Earlier Likely Due to Climate Change

Why Climate Change Matters? To understand why the birds were laying their eggs earlier, the researchers considered climate change as a potential factor. Because they couldn't find temperature data for the area dating as far back as the eggs, they used the amount of carbon dioxide in the atmosphere, which can be used to approximate temperature. The researchers found that atmospheric CO2 concentrations correlated with the changes in when eggs were laid. Although the temperature changed by only a few degrees, it was enough to mean different insects emerged and different plants bloomed. And the researchers point out that it could have an impact on what food is available for birds.

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