How many days does a birds egg take to hatch?

There's no single answer to how long a bird's egg takes to hatch because it varies greatly depending on the species. Here are some examples:

* Hummingbirds: 10-19 days

* Robins: 12-14 days

* Chickens: 21 days

* Ducks: 21-28 days

* Geese: 28-30 days

* Ostriches: 42 days

Factors that influence incubation time:

* Species: As mentioned, different birds have different incubation periods.

* Climate: Warmer temperatures generally result in faster hatching.

* Nest location: Eggs in sheltered nests may hatch slightly faster.

* Egg size: Larger eggs typically take longer to hatch.

If you're curious about a specific bird, you can search online for information about its incubation period.