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Researchers seek ways to reduce deer populations in urban areas

Ed-Ni-Photo/Getty images Family of deer eating roses in suburban garden
NUISANCE NEIGHBORS: Kansas State University researchers report that overabundant deer populations in urban and suburban areas are a growing concern. They’re studying ways to control deer populations using lethal and non-lethal methods.
From urban archery hunts to nonlethal methods, there are many ways to control overabundant deer populations.

A decade ago, wildlife officials in the Kansas City area reported that the density of deer in Shawnee Mission Park — a 1,600 acre, multiuse area — was approximately 200 animals per square mile.

“That’s about eight times what we would expect to see naturally in the most abundant areas of our state,” says Drew Ricketts, a wildlife and outdoor enterprise management specialist with Kansas State University Research and Extension.

Kansas City officials are not alone in their concern regarding overabundant deer populations in urban and suburban areas. The Association of Fish and Wildlife Agencies reported in 2018 that the population of white-tailed, mule and black-tailed deer in the United States was an estimated 30 million — up 1,000% from the 300,000 reported 100 years earlier. 

Urban and suburban areas often are attractive to deer because of an abundance of food and lack of predators.

But Ricketts notes that overabundant populations create several risks, including:

  • Collisions. Deer-vehicle collisions are becoming more common.
  • Ticks. Tickborne pathogens; ticks tend to be more abundant in areas where deer are more abundant, “and it’s more likely that the ticks are going to carry those pathogens in areas where there are a lot of deer,” Ricketts says.
  •  Vegetation damage. Deer can damage vegetation, including homeowners’ gardens or expensive plants. 

Control methods

Ten years ago, officials in the Shawnee Mission Park area addressed their problem by hiring a contractor, which then trained sharpshooters to reduce the density of deer in the park.

Ricketts notes that some groups also are interested in nonlethal means of managing deer populations, primarily by reducing birth rates. Researchers have tested the effectiveness of performing ovariectomies — removing the ovaries in the females — and found they could reduce populations by up to 45% over a wide geographic area.

Another method is essentially birth control for white-tailed deer. USDA in partnership with the Animal and Plant Health Inspection Service and Wildlife Services developed an immunocontraceptive vaccine called GonaCon to manage animal populations. The tactic indicates as much as an 86% reduction in pregnancy rates in does that were treated twice.

So far, though, culling is the least expensive option. Ricketts noted that culling costs about $540 per deer, while the ovariectomy is $1,200 on average; GonaCon — which requires two vaccinations — is $2,100 on average.

Urban archery

“Sometimes a problem also opens up a new opportunity,” Ricketts says. “We have a very successful urban archery hunting program in the greater Kansas City area, and from other studies around the country, we think we can have up to a 45% population reduction per year.”

Urban archery hunts, he adds, “uses hunters who are excited for the opportunity to harvest a deer as a tool to reduce and sustainably manage overabundant deer populations, while also saving taxpayer dollars.”

The methods used to decrease deer populations, however, often come down to the preference of local authorities and citizens.

“I would encourage reaching out to your local officials, including city council members, mayors and your wildlife and parks commissioner,” Ricketts says. “Between those groups, you will be able to have your voice heard and express your opinions about urban archery hunts, or whatever management practices you might like to be considered for overabundant deer populations in urban areas.”

More information on managing wildlife is available at K-State’s Department of Horticulture and Natural Resources.

Source: Kansas State Research and Extension is solely responsible for the information provided and is wholly owned by the source. Informa Business Media and all its subsidiaries are not responsible for any of the content contained in this information asset.
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