Deer-vehicle crashes cluster in the last three months of the year, and the advice from wildlife and extension specialists after a collision is blunt: keep away from the animal. Popular Science’s Oct. 31 guide, which draws on Raven Ridge Wildlife Center in Pennsylvania, puts the peak at October through December, the stretch when rutting bucks roam in daylight. State Farm counted about 650,000 animal-collision claims in those three months in its latest annual tally, 41% of the year’s total.
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Three forces overlap in the fall: the rut, shorter days, and clocks that moved back on Nov. 1, which drops the evening commute into dusk.
Rutting bucks and yearlings on the road after dark
Raven Ridge Wildlife Center explained to Popular Science writer Margherita Bassi that during the rut, many yearling bucks leave their birth areas in search of new territory, sometimes dozens of miles away. Some mature bucks burn through up to 20 percent of their body weight in the season, which makes them bolder and more active in daylight. The rut lasts several months in southern states and only a short stretch of fall in the Northeast, so the exact calendar of risk shifts with latitude even though the October-to-December window holds for most of the country.
Peggy Doty, a University of Illinois Extension educator in energy and environmental stewardship, noted that white-tailed deer are crepuscular, meaning most active during dusk and dawn. She added that crop harvest strips acres of cover, pushing deer to move more, and that Illinois deer hunting runs through mid-January, which keeps animals moving well past the peak.
Brian Kraskiewicz, an ecologist with the DuPage County Forest Preserve District, said October through December is deer breeding season, and NBC Chicago reported that Illinois logged more than 14,500 deer-involved crashes in 2021, about 42% of them in those three months. November was the highest-risk month, and most crashes fell between 5 and 10 p.m. or 5 and 8 a.m.
Popular Science points out that the end of daylight-saving time puts more vehicles on the road during the dusk and dawn hours when deer move most. Illinois Extension’s practical advice follows from that: use extra caution near woodlots, field edges and water, watch the roadside for eyeshine, which is the glow of headlights in a deer’s eyes, and use high beams where appropriate. Posted deer crossing signs are another cue to slow down, and Illinois Extension recommends scanning the shoulders well ahead of the car rather than only the lane in front of it.
Flashers, 911 and distance from the injured deer
Popular Science lists the steps in order: pull over safely and switch on the emergency flashers, care for any injured passengers and call 911, and resist the temptation to walk over to the deer or drag it off the road. Illinois Extension, relaying Illinois Department of Natural Resources guidance, says to call 911 if the deer is hurt and that only law enforcement officers should put down an injured animal. NBC Chicago’s version tells drivers to stay in the vehicle when traffic is close and to keep clear of both an injured deer and a dead one.
Size explains the caution. Illinois Extension puts white-tailed deer at 100 to 250 pounds, and an injured animal of that weight beside live lanes is a hazard to anyone who approaches it.
A second reason to stay put is that the first deer is rarely alone. Raven Ridge Wildlife Center observed that deer often travel in groups and walk single file, so a second animal may follow one that crossed safely, and Doty gives the same advice for drivers who merely see one cross: slow down, because more are likely behind it. Tapping the brakes or using the flashers warns traffic behind, and Illinois Extension recommends against braking hard or swerving off the road.
Claims data, odds and the paperwork afterward
State Farm’s Sept. 16, 2025 release covered July 1, 2024 through June 30, 2025. It estimated 1.7 million U.S. animal-collision claims, more than 1.1 million of them involving deer, and put a driver’s odds of a collision at 1 in 139, up from 1 in 128. West Virginia was the riskiest state at 1 in 40, followed by Montana at 1 in 53 and Wisconsin at 1 in 58. The release warns that many serious crashes occur when drivers swerve to avoid a deer, and advises photographing the scene and damage and filing a claim promptly.
State Farm’s consumer guide says deer and other animal damage may be covered by comprehensive coverage, which is the part of a policy that applies when no other vehicle is involved. State rules differ on reporting. In Illinois, per NBC Chicago, crashes with $1,500 or more in damage must be reported, and Illinois Extension adds that any resident may claim a deer killed in a collision by reporting it within 24 hours. Popular Science does not address insurance at all. Its piece, published Oct. 31, is the newest source here, and its core instruction matches the older Extension and State Farm guidance: stop, signal, stay back from the animal and call for help.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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