The Battle Over Britain's Parakeets: Invasive Species or Exotic Charm?

The ring-necked parakeet has become a fixture of the British landscape, sparking debate over whether these arrivals are a natural wonder or an invasive menace.

As populations swell across the United Kingdom, the government is considering a legal shift that would allow the public to participate in their management through sport shooting.

In Hither Green cemetery in southeast London, a sizeable chunk of the parakeet population returns to roost in poplar trees every evening, creating a clamour of noise and activity.

A Growing Population Challenge

While the birds are visually stunning, their presence affects ecology and public health.

The sheer speed of their expansion has alarmed researchers. An Oxford researcher estimated in 2003 that the Greater London population would require an annual reduction of 30% just to maintain stability. By 2016, official counts placed the UK population at 12,000 breeding pairs, though some estimates suggest the total number of individuals may exceed 50,000.

Britain's ring-necked parakeets and the push to shoot them

The birds pose several direct risks:

Disease Vectors: They are known carriers of Newcastle disease, which affects poultry, and Cryptosporidium, a parasite that causes violent diarrhea in humans.

The expansion has moved far beyond London. A 2014 report in the Northern Echo noted their arrival in Scotland, and Glasgow is now home to the world’s most northerly wild parrots.

The Push for Quarry Status

Because managing the birds is difficult, the British government is exploring a legal workaround. In March, officials opened a consultation regarding the “quarry list”—a catalog of birds that can be legally shot during certain seasons by anyone with a gun and landowner permission.

The British Association for Shooting and Conservation (BASC) has formally requested that the ring-necked parakeet be added to this list. Currently, landowners can only kill parakeets as an “invasive non-native” species if they can prove they are protecting crops or threatened wildlife and that non‑lethal methods failed. Quarry status would remove these requirements, shifting management toward a general sport‑shooting approach.

The History of Propagule Pressure

The exact origin of the British parakeet population remains a mystery, though legends vary from Jimi Hendrix releasing pets in Carnaby Street to birds escaping from the set of The African Queen. None of these stories have been verified. The Guardian reports that the most likely cause is “propagule pressure”—a steady trickle of runaway pets, deliberate releases, and aviary escapes over many decades.

The birds’ establishment follows a pattern seen in many invasive species histories. The current abundance is linked to a postwar bird‑keeping boom in Britain, where the number of pet birds rose from 600,000 in 1947 to 11 million by 1961.

The risks of unchecked invasive species are well‑documented in biological history:

Species	Origin	Impact Area	Consequence
Brown tree snake	Indonesia/Australia	Guam	Extirpated 10 of 12 endemic forest bird species
Nile perch	Africa	Lake Victoria	Consumed roughly 200 species of endemic cichlids
Chestnut blight	Japan	United States	Effectively deleted the American chestnut tree
Phylloxera	America	Europe	Destroyed an estimated 90% of European vineyards