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...
hibernation-cessation from or slowing of activity during the winter; especially slowing of metabolism in some animals. dormancy, quiescence, quiescency-a state of quiet (but possibly temporary) inaction; the volcano erupted after centuries of dormancy.