every one lays eggs. No bird gives birth to live young. Birds quickly form and lay an egg covered in a protective shell that is then incubated outside the body.
Birds developed much great mobility than a mammal, but at the cost of being unable to carry its growing offspring about in its body. Unlike, say, a dog carrying a litter of puppies.
As far as I know, most – but not all – build their nests after breeding. For most of them, it would be a waste of time and energy to build something they were not going to use. However, for some birds nesting isn't necessarily a matter of common sense. In some species building a nest is part of the courtship process,In many species the male bird's skill at nest building is a sign of his suitability as a mate; he invests huge effort in the task. Males of the European house wren build up to 12 nests to attract females. They will continue to build new nests until a female is happy with the construction.
Mrs Owens felt that Halloween is a holiday. She is not aware of the traditions that are followed this day. She thinks herself to be sure and does not wishes to identify if there is any tradition on this day. She just considers it as a holiday and refuses to give candies to the people coming her door.
