The Budgerigar Parakeet, also known as "Budgie" or English Parakeet, Melopsittacus undulatus, is probably the most common Parakeet.
The term Grass Parakeet (or Grasskeet) refers to a large number of small Australian parakeets native to grasslands such as Neophema and Princess Parrot.
The Australian rosellas are also parakeets.
Many of the smaller, long-tailed species of lories may be referred to as lorikeets.
The term Ringnecked Parakeet refers to a species of the Psittacula genus native to Africa and Asia that is popular as a pet and has become feral in many cities.
It should not be confused with the Australian Ringneck.
In aviculture the term conure is used for small to medium sized parakeets of the genera Aratinga, Pyrrhura, and a few other genere of the tribe Arini, which are mainly endemic to South America.
As they are not all from one genus, taxonomists tend to dislike the term.