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Sparrows are egg layers, therefore do not become pregnant. Their babies incubate inside of an egg that has been laid by the bird. The gestation period of the eggs is 10-15 days.

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14y ago
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9y ago

The incubation for humming birds last about 14 to 16 days. It can go as long as 21 days in cooler temperatures. Hummingbirds are on there nest 50 to 55 minutes every hour.

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14y ago

Barn swallows lay eggs. They do not gestate.

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Q: What is the gestation period for hummingbirds?
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