The monk parakeet is one of 25 tropical parrot species that have gone from pet to wild animal across 23 U.S. states.

Visitors to Chicago’s Hyde Park or New York’s Green-Wood Cemetery may be surprised to hear the raucous squawks of lime-green monk parakeets. These birds, descendants of escaped pets, have managed to ...

For this installment of "From the Archives," we answer a reader question about the monk parakeets and grackles in Austin.

Released or escaped parrots are now living in most states and are breeding in at least 21. For some, it’s a second chance at survival. You might expect to hear parrots like these in the wild in South ...

A group of green monk parakeets sits nestled at the top of Green-Wood Cemetery's 19th century gothic arched entrance. However, there is a chance you can hear them before you seem them. How vocal are ...

The unfamiliar monk parakeets got to know each other slowly before moving on to behaviors like preening, pictured here. Claire O'Connell Monk parakeets are highly social birds. These bright green ...

Black-capped chickadees, dark-eyed juncos and cardinals congregate around a backyard feeder as birdseed falls to the grass like sprinkles. Suddenly, from the sky comes a flash of vivid green and blue, ...

In the urban parks of Barcelona, Spain, the calls of a tropical parrot fill the air. The bright green monk parakeet, native to South America, has found a new home in European cities. Monk parakeets ...

Monk parakeets are highly social birds. These bright green parrots live together in large groups, building sprawling, multifamily stick nests that often include chambers for dozens of individuals.