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.
the dodo laid eggs like any other normalish bird.
Cuckoos and cowbirds are famous for laying their eggs in other birds' nests, and leaving the chicks to be raised by the other birds.
a mature, egg-laying bird, or bird of egg-laying age that is temporarily not laying eggs; in most cases a female bird more than 5 months old. An adult, female bird.
Yes. The kookaburra is a bird. It has feathers, and it reproduces by laying eggs.
A bird
Yes it is a member of the bird family so it lays eggs.
The kea is a bird, and birds reproduce by laying 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.
never
They're birds. Laying eggs is one of the things that defines them as birds.
Kiwi
The bird that is on the record for having lay the most eggs in a recorded year was a Black Australorp.