yes all birds do as i know that question is just round my house there is alot of wild birds and in my barn and there is alot of nest so all wild and not wild sits on its eggs ! glad to help hope its a good answer!! ....
In most countries it is ILLEGAL to collect or POSSES wild bird eggs.
The cuckoo bird lays its eggs in the nest of a different species of bird, sometimes pushing the old eggs out of the nest and laying new ones, or laying thier eggs ontop of the old eggs. the cuckoo will pick a next in which the eggs look similar to thier own. they will not sit on these eggs, but let the other bird sit on them, occationally checking the bird to see if it is still sitting.
Birds lay eggs, they do not have a baby. A bird may lay eggs and sit on them but unless there is a male with her, they are not fertilized and will not hatch.
It's a maternal instinct - in the wild hens / birds sit on their eggs to keep them warm grow into chicks and hatch. Most eggs now are unfertilised but the hen retains the maternal instinct to sit on them anyway.
They sit on them to incubate them, to encourage growth by providing temperature and security
There are many birds that do not have to sit on their eggs constantly. Robins only sit on the eggs occasionally.
If the baby bird is alive, she doesn't sit on it at all! She sits near it and snuggles up to it. She sits on the eggs until they hatch, which is different depending on the type of bird.
Bird eggs will only develop at a temperature close to the body temperature of the parent bird. Thus, a parent bird usually incubates the eggs by sitting on them to keep them warm.
They don't lay eggs on water. The egg is heavier than water and would break on the bottom of the source of water. They couldn't sit on the eggs in water.
Frogs that spawn in water appear to sit on their nest while they are laying their eggs. Frogs that spawn in damp leaf litter may sit on the clutch to protect them.
Female birds often lay eggs even when a male is absent. The eggs are not fertile. The female is doing what is natural for the wild.
That bird's eggs. The possessive noun is in bold.