Monk parakeet
The monk parakeet (Myiopsitta monachus), also known as the quaker parrot, is a small, bright-green parrot with a greyish breast and greenish-yellow abdomen. In most taxonomies, it is classified as the only member of the genus Myiopsitta. It originates from the temperate to subtropical areas of Argentina and the surrounding countries in South America. Self-sustaining feral populations occur in many places, mainly in North America and Europe.
Description
The nominate subspecies of this parakeet is 29 cm (11 in) long on average, with a 48 cm (19 in) wingspan, and weighs 100 g (3.5 oz). Females tend to be 10–20% smaller, but can only be reliably sexed by DNA or feather testing. It has bright-green upperparts. The forehead and breast are pale gray with darker scalloping and the rest of the underparts are very light-green to yellow. The remiges are dark blue, and the tail is long and tapering. The bill is orange. The call is a loud and throaty chape(-yee) or quak quaki quak-wi quarr, and screeches skveet.