 In December 2019 Steven Le Comber, of Queen Mary University in London, United Kingdom, published an analysis in the "Journal of Zoology," based on geographic profiling methods and concluded that the thriving parakeet population in the United Kingdom, had grown from numerous small-scale accidental and intentional pet releases.Previous theories had included a pair released by Jimi Hendrix on Carnaby Street and an arrival in 1951 when Humphrey Bogart and Katharine Hepburn visited London with various animals to film "The African Queen," set in the equatorial swamps of east Africa.According to a 2018 report, Spanish authorities have drawn up plans to curb the ever-growing population of parakeets which has reached 30,000 in locations such as Malaga.