Female American Robin starting incubating her eggs.(1/5/24)

On The Nest
Until they've laid a full clutch, robins allow all the eggs to stay cool so the babies don't start to develop. That's pretty smart! It means all the babies hatch close to the same time. Mother robins may start incubating their eggs during the evening after the second egg is laid, or after all the eggs are laid. They sit on the eggs for 12 to 14 days. The female usually does all the incubating. Even in good weather, she rarely leaves her eggs for more than 5 to 10 minutes at a time.
journeynorth.org/tm/robin/Egg...

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