As anticipated, our female Peregrine laid her first egg either late Sunday night or early Monday morning. So what happens next? Peregrines, like all birds, don’t begin incubating the first egg immediately after it is laid. The female Peregrine is likely to lay more eggs. However, eggs are typically laid 2-3 days apart. It is not until the clutch is complete will the pair begin incubating the clutch. This way all the eggs hatch at approximately the same time.