But cover, whether natural or artificial, is a double-edged sword. It protects birds but may also shield the approach of a hunting hawk (or a ground predator like a cat). No matter what you do, hawks will continue to kill birds if you attract birds to your yard, because it is natural.
Actual notice. Actual notice is a law term, used most frequently in civil procedure. It is notice (usually to a defendant in a civil proceeding) delivered in such a way as to give legally sufficient assurance that actual knowledge of the matter has been conveyed to the recipient. Personal service, that is, physically handing something to an individual, is usually considered the least-disputable method of giving actual notice.
2. In the law relating to fixtures, (q.v.) annexation is actual or constructive. By actual annexation is understood every movement by which a chattel can be joined or united to the freehold.