As someone who’s spent over a decade exploring the backcountry and working with outdoor enthusiasts, I’ve seen a lot of deer. And while most encounters are peaceful, sometimes you come across a deer exhibiting truly bizarre behavior or physical symptoms. From reports of arterial worms in deer to unsettling images on trail cameras, it’s natural to be concerned – and to wonder what’s going on. This guide aims to help you understand some of the more unusual things you might observe in the whitetail and mule deer populations across the USA, what might be causing them, and when to report your observations. We’ll cover everything from strange physical anomalies like black spots on deer to concerning behaviors like deer smashing head on rock, and even address questions like why do deer tongues hang out.
Before diving into the truly unusual, let’s quickly review some common deer health concerns. Chronic Wasting Disease (CWD) is a major issue in many states, particularly in the Midwest and West. It’s a fatal neurological disease that affects deer, elk, and moose. (See National Park Service CWD Information for detailed maps and updates). Other common problems include Lyme disease, ehrlichiosis, and various parasitic infections. These often manifest as lethargy, weakness, or skin lesions. However, the issues we’ll focus on here are less frequently discussed and often more visually disturbing.
While external parasites like ticks are readily visible, internal parasites can cause a range of strange symptoms. Muscle worms in deer, for example, can cause weakness and emaciation. But more recently, there’s been increased attention on arterial worms in deer. These parasitic nematodes live in the arteries and can cause lameness, neurological issues, and even death. The presence of these worms can sometimes be indicated by a deer exhibiting circling behavior – why do deer walk in circles? – or appearing disoriented. Reports of deer with hole in its back can sometimes be related to abscesses formed around these worms, though other causes are possible.
Deer skin conditions can range from mild irritation to severe mange. Whitetail deer with mange often exhibit hair loss, thickened skin, and intense itching. But sometimes, you’ll see something far more unusual. Piebald deer, characterized by patches of white fur, are a result of genetic mutations. While often beautiful, they can be more susceptible to predation and sun exposure. Similarly, deer with black spots on deer or white spots on deer meat (which should never be consumed – see safety section below) can indicate various skin diseases or fungal infections. These spots aren’t always a sign of serious illness, but they warrant observation. Understanding deer fur patterns can help you differentiate between normal variations and potential health problems.
Sometimes, it’s not a physical ailment but a strange behavior that catches your eye. I’ve heard countless stories from guides and hunters about unsettling observations. One recurring theme is deer with tongue hanging out, or deer sticking tongue out. This can be a sign of several things, including neurological issues, heat stress, or even a severe oral infection. Seeing a trail cam deer with tumors on the tongue is particularly alarming and should be reported to your state’s wildlife agency.
Perhaps the most disturbing reports involve deer exhibiting neurological problems. The phenomenon of a deer head exploding, while sensationalized, often refers to severe head trauma resulting in skull fractures and brain damage. This can be caused by collisions with vehicles, falls, or even repeated impacts against objects – leading to instances of deer smashing head on rock. Another unsettling observation is a buck with head stuck in antlers, often a result of becoming entangled in fencing or brush. These situations are often fatal. Brain abscess syndrome deer is another neurological condition, though less common, that can cause similar symptoms.
Beyond skin conditions, some deer are born with or develop truly unusual physical features. The image of a deer with deer head in antlers is a particularly disturbing one, often linked to genetic abnormalities or developmental issues. While rare, these cases highlight the potential for significant deformities in deer populations. Seeing a deer walking on bones (referring to exposed bone due to severe injury or disease) is also a heartbreaking sight.
During pregnant deer images and fawning season, certain behaviors and physical changes are normal. A noticeably swollen pregnant deer belly is expected. However, unusual behavior during this time, such as extreme lethargy or abandonment of fawns, could indicate illness or stress. It’s crucial to observe from a distance and avoid disturbing the deer.
As an outdoor professional, you’re likely to encounter distressed deer. Here’s a breakdown of what to do:
This is critical: never consume meat from a deer that appears sick or exhibits any unusual symptoms. Black spots on deer meat or white spots on deer meat are a clear indication that the animal is not fit for consumption. CWD, while not known to infect humans, is a serious concern, and consuming meat from an infected animal is strongly discouraged. Always follow your state’s regulations regarding deer harvesting and testing for CWD. The USDA provides resources on safe handling of wild game: USDA Food Safety and Game Animals.
I’ve seen this phrase thrown around online, often in a dismissive way towards hunters. While it’s easy to make light of the situation, it underscores a crucial point: proper field dressing and meat care are essential for ensuring the safety and quality of venison. If you’re new to hunting, seek guidance from experienced hunters or take a hunter education course. Respect for the animal and responsible harvesting practices are paramount.
Understanding these unusual deer behaviors and health concerns is vital for anyone who spends time in the outdoors. By being observant, reporting your findings, and practicing responsible outdoor ethics, we can all contribute to the health and well-being of these magnificent animals. Remember, a little knowledge can go a long way in protecting our wild spaces and the creatures that call them home.