Birds that arrive early might survive better than birds that arrive later why

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Explanation:

In summary, early arrival of migratory birds on breeding grounds can potentially lead to higher reproductive success solely as a result of the greater time available for laying replacement clutches, should early nesting attempts fail.

The benefits of early arrival are greatest when nest survival rates are constant or ... Why do earlier‐arriving migratory birds have better breeding ... arrival date may be a correlate, rather than the driver ...