The Scarlet chested parrot aka Neophema splendida is an Australian native grass parrot and when Europeans first arrived in Western Australia they were seen all around the Swan River settlement. 
Sadly this is not the case today in the 21st century, where you would would have to travel out to far remote regions to even have the chance of a possible sighting.  What was once a commonly seen bird in the new colony is now more commonly seen in the aviaries of Europe in the most amazing colours.  
To say the Scarlet chested parrot is a popular bird is quite an understatement.  Not only is their beautiful colours an attraction, their ease of keeping makes them a particularly excellent beginning aviary bird.  Their ease of care, providing you stick to a few suggestions provided by Birdman Dad, makes them a very popular choice worldwide.