From left to right      

Male Scarlet Chested Parrot

Female White Fronted Scarlet chested Parrot.

Male Yellow Turquoise Parrot.

Male White Fronted.

Female Scarlet Chested Parrot.

below Female Scarlet Chested Parrot.

Scarlet Chested Parrot scientific name is) Neophema Splendida 

Average Size body 100mm + 100mm tail

Turquoise Parrot (scientific name is) Neophema pulchella

Average size Body 110mm + 90mm tail