Bird masturbation may sound unusual, but scientists say it is natural, widespread, and often misunderstood.
For years, many bird owners and breeders have viewed masturbation in parrots and other pet birds as a warning sign. They often believed it meant the bird was stressed, bored, lonely, or living in poor conditions.
A new evolutionary study challenges that idea. Researchers found that the behavior appears across many bird species, including birds in the wild, which suggests it is a normal part of avian biology rather than simply a problem caused by captivity.
The study was published in Ecology and Evolution and led by Chloe Heys at the University of Lancashire, with coauthors from Swansea University, the University of Oxford, and the University of Liverpool. Oxford said the research collected data on 120 bird species across 22 major bird groups, including both captive and wild birds. :contentReference{index=0}
A Behavior Long Treated as a Problem
Pet bird owners have often been told to stop or discourage the behavior. Some owners remove toys, perches, or other objects. In more serious cases, birds may receive hormone treatment or other veterinary intervention.
The researchers argue that many of those responses may be unnecessary and could even harm bird welfare. Their main finding is that the behavior is not simply a negative response to captivity.
The Guardian reported that the study found the behavior was more common in wild birds than in captive birds. The authors said this finding has major welfare implications because it challenges the belief that the behavior mostly comes from isolation or stress. :contentReference{index=1}
Researchers Studied 120 Bird Species
The team pulled together records from scientific literature, surveys, bird keepers, breeders, and online bird communities. They then compared the behavior across species, sexes, ages, environments, and mating systems.
The research found that masturbation occurs in many parts of the bird family tree. That pattern suggests the behavior may have deep evolutionary roots.
Male birds made up 55 percent of recorded cases, while female birds made up 36 percent. Oxford also reported that juveniles and adults were both likely to show the behavior, with 100 percent of juvenile records and 97 percent of adult records involving it in the available dataset. :contentReference{index=2}
The behavior appeared in birds from many groups, including parrots, ducks, turkeys, and chickens, according to The Guardian’s report on the paper. :contentReference{index=3}
Why the Findings Matter for Pet Bird Owners
The study could change how owners and veterinarians respond when pet birds show sexual behavior. Instead of assuming something is wrong, experts may need to look at the wider picture of the bird’s health, environment, and behavior.
Chloe Heys said the study finds the behavior is “natural, healthy, and widespread” across many bird species. She said the work may help owners, breeders, and conservationists better understand birds in their care. :contentReference{index=4}
That does not mean every case should be ignored. If a bird shows signs of injury, distress, repeated irritation, or other health problems, owners should speak with an avian veterinarian.
But the study suggests the behavior itself should not automatically be treated as abnormal or punished.
Possible Evolutionary Reasons
Scientists are still studying why the behavior evolved. One idea is that it may act as a sexual outlet when mating is not available.
The study also found that the behavior appeared more often in species with less restricted mating systems. That may mean it has some link to reproductive competition or fertility, although more research is needed.
Dr. Matilda Brindle, an evolutionary biologist at the University of Oxford and a coauthor of the study, said the findings add to growing evidence that non reproductive sexual behaviors occur across the animal kingdom. :contentReference{index=5}
In simple terms, birds may be doing something that is far more normal in nature than many humans assumed.
A Shift in How People Understand Birds
The study is important because it turns a common belief upside down. What many owners saw as a sign of stress may actually be part of normal bird behavior.
It also shows how much animal behavior is still misunderstood when humans judge it through a human lens.
For bird owners, the message is not to panic. A bird showing sexual behavior is not always lonely, sick, or mistreated.
For veterinarians and breeders, the research may push a larger change. Instead of rushing to stop the behavior, they may need to ask whether the bird is healthy, safe, and otherwise acting normally.
The study’s larger lesson is simple. Birds are more complex than people often realize, and some behaviors that look strange to humans may be completely natural in the animal world.