April 1, 2013
What to Do About Pigeons
When pigeon flocks grow too large, use these humane methods to control their numbers
From a pigeon’s perspective, city living can’t be beat. Food and water are readily available. Predators are rare. Plus, there’s plenty of free housing. Pigeons find our window ledges, rooftops, bridges, and warehouses to be ideal substitutes for the natural ledges in cliff sides that they have always used as roosting, nesting, and sheltering sites.
When flocks grow too large and become a nuisance, killing the birds is often the first plan of action. But killing pigeons doesn't work, and there are better, non-lethal ways to fix a pigeon problem.
Three steps to humanely solve a pigeon problem
You may just need one or a combination of all three techniques, depending on the size of the pigeon population you're dealing with.
1) Stop feeding the pigeons (intentionally or not)
Most conflicts with pigeons can be tied at one point or another to feeding, intentionally or otherwise.
Pigeons get fed plenty of handouts and garbage, but there are also well-intentioned pigeon lovers who regularly feed the birds. This does the pigeons more harm than good as the pigeons begin to gather in large numbers, often leading to inhumane and ineffective attempts to reduce their numbers.
When such troubles arise, the best thing for the birds is to reduce feeding gradually over several weeks. The flock will gradually disperse until the remaining number of birds matches what the area can naturally support.
Unintentional food sources
Even when not feeding on purpose, we humans are messy, leaving leftovers and dropped crumbs everywhere. Pigeons hang around town squares, public parks, and other trafficked areas to help themselves to what we leave behind, especially when convenient roosting and nesting sites are nearby. To discourage pigeons from gathering, food attractants need to be cleaned up regularly.
In suburban neighborhoods, too, homeowners may mistakenly feed pigeons or they may be providing food for pigeons inadvertently when feeding their backyard birds by tossing seed on the ground, rather than putting it in birdfeeders. To discourage pigeons visiting your yard, change the type, amount, and timing of feeding. If most of the pigeons fail to move elsewhere, you’ll need to stop feeding all birds for a couple weeks. (Don't worry; the birds won't starve.) When you resume feeding, only put out seed in birdfeeders and keep the ground below them cleaned up.
2) Prevent roosting and nesting
Pigeons look for flat surfaces for roosting and nesting. Encourage them to do these things elsewhere by making flat surfaces unavailable to them. With the correct application of the right product, roosting structures can be rendered virtually pigeon-free.
There are a variety of devices that can be used to change flat nesting spots into inaccessible spaces and prevent pigeons from roosting in areas where they’re not wanted. We suggest the following, all of which can be ordered from birdbarrier.com or 800-NO-BIRDS.com:
- Attach wood or metal sheathing (Birdslides) at a 45- to 60-degree angle over window ledges and other flat surfaces to keep pigeons from landing.
- Install “bird wires” to keep pigeons off ledges, railings, awnings, and rooftops.
- Where the problem is more serious, consider using strips that give mild electric shocks.
- Use netting to keep pigeons out of large areas.
NEVER use polybutylene gel. Sticky gel repellents made from polybutene can harm all birds and any animal that comes in contact with it. The HSUS strongly recommends that these dangerous repellents be avoided at all costs. The feathers of any bird who comes into contact with the dense, sticky gel will become damaged, interfering with their ability to fly and to stay water-proofed.
These gel repellents are not selective. Other birds are likely to land on the gel, get stuck, and die a slow death. The polybutene gels are particularly harmful to smaller species.
3) Limit flock size with pigeon birth control
As year-round nesters, a pair of pigeons can raise a dozen or more young each year. If pigeons have plenty of food and space, their numbers can quickly increase. Fortunately, a bird contraceptive is available that limits growth of pigeon flocks.
Known as OvoControl, pigeon contraception comes in the form of a kibble-type food, which causes birds who eat it regularly to lay eggs that fail to develop. In March 2010, OvoControl received landmark general-use approval by the Environmental Protection Agency. Visit ovocontrol.com to learn more about the product and how you can implement an OvoControl program.
Combined with exclusion and other humane measures to discourage roosting and nesting, OvoControl effectively reduces hatching rates in pigeons, thereby limiting flock sizes and diminishing problems associated with large numbers of pigeons.
Business owners who pledge to use OvoControl instead of lethal methods can download our free signage and educational materials. In Hawaii, where pigeons can be a major problem, businesses that have started OvoControl programs have seen a noticeable decrease in pigeon numbers.
Pigeon droppings and public health
Disease risk from pigeon droppings is often used to justify killing pigeons, but fresh bird droppings have not been shown to present a health risk.
People may fear that pigeons roosting or nesting nearby, or more specifically the droppings that accompany such sites, are a health threat. These fears usually focus on histoplasmosis, a fungus that grows in dropping-enriched soil, and on diseases caused by Cryptococcus and Salmonella. However, there is little evidence linking pigeons directly to human infections.
Histoplasmosis fungus is common in the eastern and central U.S. As many as 80 percent of people tested in these areas prove to have already been exposed to the fungus without knowing.
According to the Centers for Disease Control, fresh bird droppings on surfaces such as sidewalks and windowsills have not been shown to present a health risk. People should avoid contact with any animal droppings, of course, and ordinary good hygiene, such as washing hands and leaving shoes at the door, are adequate prevention if you accidentally come into contact with animal droppings.
Killing, by any means, isn’t just cruel; it fails to solve the root cause of the problem, leading to an endless cycle of killing.
The misleadingly marketed Avitrol brand poison is used to kill pigeons. Promoted as a “flock frightening agent” or “repellent”, it is in fact a nervous system poison. Birds who consume it suffer convulsions and die. It is not only traumatic for the birds to die this way, but also for any people—especially children—who witness or try to help the dying birds.
Users claim that the distressed behavior of poisoned birds frightens other flock members away. Yet any "frightening” effect of Avitrol on surviving birds is very short-lived, because remaining birds return quickly and reproduce. Taking a small subset out of the population really doesn’t accomplish much other than opening up niche space for other birds to fill. The end result of the use of Avitrol or other lethal pigeon control methods is an endless cycle of unnecessary killing.
The HSUS also opposes the common practice of trapping and removing pigeons. Trapped birds are typically killed, and if not killed immediately, may be used in cruel pigeon shoots or live the remainder of their lives in permanent confinement. The removal of birds without getting at the cause of the conflict is a woefully inadequate approach to problem management.