Key Fields in a Database. Keys are crucial to a table structure for many reasons, some of which are identified below: 1  They ensure that each record in a table is precisely identified.  They help establish and enforce various types of integrity.
avifauna definition: The definition of avifauna are the birds that live in a certain place or at a certain time. (noun) An example of avifauna is penguins living primarily in Antarctica. An example of avifauna is the moa of New Zealand becoming extin...
1. (Animals) any of various birds of prey of the genera Aquila, Harpia, etc, having large broad wings and strong soaring flight: family Accipitridae (hawks, etc). 2. a representation of an eagle used as an emblem, etc, esp representing power: the Roman eagle.