I say you keep them there. They will only be there for awhile and they cant bother you that much. To avoid the birds coming back the next year, put something to block them from being able to make a nest. This is much better then knocking over the nest that took them so long to make.
You may, on the other hand, want to consider the damage that they could be doing to your home, as well as the over 60 diseases that their droppings can carry. Many of the diseases caused by bird droppings are caused by an airborne fungus, which, if allowed to circulate in your home, greatly increases your health risk.
You can evict the birds, perhaps with a Transonic Pro (http://www.bird-x.com/trans.html). It plays both sonic and ultrasonic sounds that makes birds feel extremely uncomfortable, which will probably cause them to leave. Visit http://www.bird-x.com for more information.
House Sparrows tend to nest in and around buildings. They scavenge around domestic rubbish and also eat seeds. They are definitely attracted to bird feeders. They feed their young on small insects and inveterbrates.
House sparrows are about 6.25 inches long and have a wingspan of about 9.5 inches. They weigh around 1 ounce.
You can destroy it or put it back where it came from. Since house sparrows are not native they are excluded by the migratory bird act.
yeahhh
Sparrows originally came from China. But, the climate started to change, and the sparrow migrated to North America. Today, the climate in China is slowly changing, but there is still very little sparrows there. (About 2%)
Passer domesticus
Omnivore
Yes, house sparrows are not protected by law in the United States. They are considered an invasive species and are not covered under federal or state protection laws.
No there has been no bad omens from flinging sparrows.
Yes, it is extremely common.
the house sparrow nest has three to six eggs
The House Sparrow is monogamous and mates for life .