CHICAGO — At a quiet street intersection in Chicago's Englewood neighborhood, the imposing figure of a pine tree is only outweighed by the massive collection of sticks and twigs carefully placed on ...

Monk parakeets have been flapping around Houston for around 50 years. Having logged just 20 years in the city myself, I feel some reticence calling them an invasive species. Yet, technically, the monk ...

Monk parakeets risk losing their hard-won social standing if they are absent from their flock for just eight days. And the highest-ranking birds lose the most status during their brief absence.

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 ...

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 ...

Spotted a flash of green in the Houston suburbs? It might have been a monk parakeet, an invasive species that has been flying around in Texas for nearly 50 years. Here's what you should know about our ...