Ring-necked Parakeet by Howe Park Wood, April 2012, by Harry Appleyard

Their bright green feathers and unmistakable squawk make ring-necked parakeets a striking addition to British park wildlife, but the question of how the tropical birds were first introduced has been a subject of contention.

Click here to read the rest of the article.: Hendrix? Hepburn? Study busts myths about origins of UK’s parakeets | Science | The Guardian