Found Hibernating Snakes or Bats in Massachusetts Winter?
The First Rule: Do Not Warm Everything Up
A winter wildlife discovery feels urgent because the animal may look weak, motionless, or half dead. That does not always mean the right answer is heat. Many snakes in Massachusetts spend winter in a slowed state called brumation. Many bats use deep torpor or hibernation to survive months when insects are not available. Warming either animal in a living room can push its body back toward activity at the wrong time.
The other mistake is just as bad: leaving the animal fully exposed on frozen ground after you have removed the cover that protected it. A woodpile, stone edge, old foundation gap, cellar corner, or sheltered crevice can be part of the winter refuge. Once that cover is gone, the animal may not be able to crawl or fly to another safe place.
The safest first move is usually to stop what you are doing. Keep children, dogs, and cats away. Do not poke, wash, feed, warm, or carry the animal around for a better look. Then decide whether it is a snake, a bat, an injured animal, or a possible exposure case.
When You Find Garter Snakes in a Woodpile
This is a real Massachusetts winter situation. Someone pulls logs for a stove or fireplace in January, February, or early March and finds one or several garter snakes tucked into the lower layers. They may be stiff, slow, or barely responsive. That condition can be normal for a snake that has been using the pile or nearby ground as winter shelter.
If you can safely leave that section alone, the least harmful answer may be to stop taking wood from that area and rebuild loose cover over the snake. Use light pieces, bark, leaf litter, or loose wood around the animal rather than heavy logs placed directly on top of it. The goal is to restore insulation and darkness without crushing it.
If the snake is already exposed on open snow, a driveway, or a hard frozen surface, do not carry it across town. Moving winter wildlife far from its original shelter can be more harmful than helpful. If the animal is not injured and you can do it without direct bare-hand contact, place it a few feet away under nearby outdoor cover that will not be disturbed again: loose leaves, a protected edge of the same woodpile, a brush pile, or another cold, sheltered outdoor spot.
What Not to Do With a Cold Snake
Do not bring a cold garter snake into the house to warm up for the night. A snake that wakes in a warm room may become active when there is no food, no safe release weather, and no proper winter shelter. It can burn through energy it needed to survive until spring.
Do not put the snake into a bucket near a heater. Do not try to feed it. Do not pour water over it. Do not assume that a still snake is dead unless there is obvious injury or decomposition. Cold snakes can be very slow. A quiet response usually gives them a better chance than a rescue attempt that changes their body temperature too fast.
If the snake has been cut by a tool, crushed by logs, attacked by a pet, or left exposed for a long time, that is different. Then the question is no longer just shelter. Contact a licensed Massachusetts wildlife rehabilitator or MassWildlife instead of trying home care.
If the Animal Is a Bat, Slow Down More
A bat is not handled like a garter snake. The first question is not whether the bat looks cold. The first question is whether any person or pet may have had contact. If a bat was in a room with a sleeping person, an unattended child, someone who could not reliably report contact, or a pet, do not release it outside. That can become a rabies exposure question even when nobody saw a bite.
Keep people and pets away from the bat. Do not touch it with bare hands. If it is safe to contain the bat without direct contact, use the usual low-risk approach: a small container or box over the bat, cardboard slid underneath, and a secure ventilated container. Then call the local board of health or the Massachusetts DPH Epidemiology line at 617-983-6800 for exposure guidance.
If there was clearly no contact risk and the bat was found cold in a garage, shed, porch, basement, or outside area during freezing weather, do not simply toss it outdoors. Winter release can kill a bat if the weather is too cold, windy, wet, or food-scarce. A licensed wildlife rehabilitator is the better contact for a bat that needs winter handling.
A Simple Decision Table
| Situation | Better first move | Why |
|---|---|---|
| Garter snake under firewood, not injured | Stop using that section and restore loose outdoor cover | It may already be in a winter shelter |
| Snake exposed on snow after logs were moved | Move only to nearby protected outdoor cover if safe | Long-distance relocation can make survival harder |
| Snake cut, crushed, or attacked by a pet | Contact a licensed wildlife rehabilitator | It is now an injury case |
| Bat in bedroom, with a sleeping person, unattended child, person who could not reliably report contact, or pet | Do not release; call local health officials | This can be a possible rabies exposure |
| Bat found cold in winter with no contact risk | Contain safely and call a rehabilitator | Outdoor release in freezing weather can be fatal |
How to Give Shelter Without Creating a New Problem
For snakes, the useful shelter is cold, protected, and close to where the animal was found. Think insulation and quiet, not warmth. A loose layer of leaves, bark, brush, or wood near the original spot can keep wind and direct freeze off the animal while still letting it remain in a natural winter state.
For bats, shelter is different because of rabies risk and the way bats use small roosting spaces. Do not tuck a bat into a woodpile, under leaves, or into a random crack by hand. If there is no exposure concern, the immediate goal is safe temporary containment until a rehabilitator gives instructions. Keep the container secure, ventilated, quiet, and away from children and pets.
The same principle applies to both animals: do not turn a brief winter discovery into a pet-care project. These animals do not need a warm family room. They need either restored outdoor protection or the right Massachusetts professional path.
Who usually fits the situation
- MassWildlife: call 508-389-6300 for general wildlife questions, state guidance, and situations where you are unsure whether intervention is appropriate.
- Licensed wildlife rehabilitator: injured animals, exposed bats without a safe release path, and animals that may need short-term professional care. Start with the Massachusetts wildlife rehabilitator list.
- Local board of health or DPH: bat bites, scratches, or any bat found where contact with a person or pet cannot be ruled out. The Massachusetts DPH Epidemiology line is 617-983-6800.
- Animal control: local public safety situations, loose animals in living space, or town-specific wildlife response questions.
When to Call in Massachusetts
Call sooner if the animal is injured, if you cannot restore shelter safely, if a pet had contact, or if a bat was found in any situation where contact cannot be ruled out. For routine wildlife questions, MassWildlife is the statewide starting point at 508-389-6300. For injured wildlife, use a licensed wildlife rehabilitator. For bat exposure questions, use your local board of health or the Massachusetts DPH Epidemiology line at 617-983-6800.
The contact matters because snakes and bats fall into different risk categories. A cold garter snake in a woodpile is usually a winter shelter problem. A bat in a bedroom can be a public health problem. A visibly injured animal is a rehabilitation problem. Treating all three the same way is where people get into trouble.
If you are unsure, do not handle the animal while you think it over. Photograph it from a safe distance if that helps with identification, keep pets away, and make the call before moving it.
The Short Version
If you find a cold garter snake in a Massachusetts woodpile, do not bring it inside. If it is not injured, restore cold outdoor cover near where it was found. If it is injured or fully exposed with no safe cover, call for wildlife help.
If you find a bat in winter, do not touch it bare-handed and do not release it if there is any possible human or pet exposure. A bat found in a room with a sleeping person, unattended child, person who could not reliably report contact, or pet belongs in the health-call path. A cold bat with no exposure risk still needs careful containment and rehabilitator advice, not a quick toss into freezing weather.
The right winter response is quiet, local, and conservative: protect the animal from exposure without waking it unnecessarily, protect people and pets from contact, and use the correct Massachusetts contact when the situation is beyond simple outdoor cover.
Common Questions
Should I bring a cold garter snake into the house?
No. A warm room can wake a brumating snake when there is no winter food available. If the snake is not injured, the safer goal is usually cold outdoor shelter, not indoor warming.
Can I put the snake back inside the woodpile?
If the pile is still usable and you can do it without crushing the snake, rebuilding loose cover near the same spot is often better than moving it far away. Do not bury the animal tightly or place heavy logs on top of it.
What if I already moved the wood and the snake is exposed on snow?
Keep pets and children back, avoid bare-hand handling, and place the snake under nearby loose outdoor cover if that can be done safely. If it is injured or cannot be protected, contact a licensed wildlife rehabilitator or MassWildlife for advice.
Should I release a bat outside in freezing weather?
No. A bat found in winter may not survive a simple outdoor release during freezing weather, wind, or storms. If there was no contact risk, contain it safely and call a licensed wildlife rehabilitator for guidance.
What if the bat was in a bedroom while someone slept?
Treat that as a possible rabies exposure situation. Do not release the bat. Keep people and pets away, safely contain it if possible, and call your local board of health or the Massachusetts DPH Epidemiology line at 617-983-6800 for advice.
Can I feed a cold snake or bat to help it survive?
No. Feeding is not the first-aid step for a winter-dormant wild animal. Food, warmth, and handling can create more stress. Shelter, safe containment when needed, and the right Massachusetts contact are more important.