Most people who find an injured or apparently orphaned wild animal want to help. The instinct is sound. The execution, however, often causes more harm than good. Feeding the wrong food, handling the animal excessively, keeping it too long before seeking professional care, or simply misjudging whether the animal actually needs help at all—any of these mistakes can reduce survival odds or transform a recoverable situation into a fatal one. Speed matters in wildlife first response, but so does restraint.
This guide covers the correct immediate steps for the first hour, the most common misidentifications of animals that do not actually need rescue, and how to find a licensed wildlife rehabilitator quickly. Specific notes for opossums are included throughout, as they have some unique biology that affects first-response decisions.
First Assessment: Does This Animal Actually Need Help?
Before touching anything, stop and assess whether the animal is genuinely in distress. Well-meaning rescues of animals that did not need rescuing remove wildlife from its habitat unnecessarily and burden rehabilitators with animals that would have survived on their own.
Common situations that look like emergencies but often are not:
- Baby opossum 7 or more inches long (nose to tail base, not including the tail): Opossums of this size are fully weaned and self-sufficient. A juvenile opossum found alone at this size does not need rescue—it is simply going about its independent life. Individuals under 7 inches without a mother do need a rehabilitator.
- Fledgling bird on the ground: Young songbirds go through a fledgling stage in which they spend one to two weeks on or near the ground as their flight feathers develop. This is normal. Their parents are almost certainly nearby and still feeding them. Unless a cat is present or the bird is obviously injured, leave it alone.
- Baby rabbit found in a grass nest: Cottontail mothers visit their nests only at dawn and dusk to minimize predator detection. A nest of young rabbits found in your yard is almost always being actively attended even though you never see the mother. Disturbing the nest reduces their survival odds.
- Animal that is not fleeing from you: An animal that does not run when approached is not necessarily tame. Illness, shock, and exhaustion all suppress the flight response. This is actually a sign the animal may need help—but it does not mean it is safe to handle without protection.
Containment: The Right Way
If the animal genuinely appears injured or orphaned, your first task is safe containment. Use a cardboard box sized appropriately to the animal—large enough that the animal is not cramped, small enough that it cannot build up momentum to injure itself. Punch several ventilation holes in the sides and lid.
Line the box with paper towels or a smooth cloth. Do not use terry cloth towels or anything with loops—small claws and toenails tangle in looped fabric, causing additional injury. Place the box in a dark, quiet location away from pets, children, and household noise. Darkness reduces stress significantly for most wildlife species.
Wear gloves if available when handling the animal. Even small animals can bite, and any bite from a wild mammal should be evaluated by a physician. Minimize handling time to whatever is necessary to place the animal safely in the box.
Temperature: Preventing Shock
Injured and orphaned animals lose body heat rapidly and are prone to life-threatening hypothermia even in warm weather. Providing supplemental warmth during the first hours significantly improves survival odds while you arrange transport to a rehabilitator.
The safest method: place a heating pad set to its lowest setting under one half of the box only. This allows the animal to move off the heat source if it becomes too warm. Alternatively, fill a plastic bottle with warm (not hot) water, wrap it in a cloth to buffer direct contact, and place it in the corner of the box.
Never place a heat source under the entire box and never use high heat settings. Hyperthermia (overheating) is as dangerous as hypothermia for a compromised animal.
Critical Mistakes to Avoid
The following errors are common and frequently fatal:
- Do not give food or water. Offering food or water to an injured animal risks aspiration—inhaling liquid into the lungs—which causes pneumonia. Incorrect diet causes organ damage quickly: cow's milk kills baby mammals within days. A thirsty animal needs a rehabilitator to provide fluids safely, not a bowl of water.
- Do not handle more than necessary. Every handling event triggers a stress response. In already compromised animals, repeated stress responses cause secondary physiological injury and can be lethal. Place the animal in the box once and leave it alone until transport.
- Do not attempt to keep the animal. Possessing wild animals without a state or federal rehabilitation permit is illegal in every US state. Beyond the legal issue, home care without proper training, equipment, and species-appropriate diet produces poor outcomes. Animals that imprint on humans during hand-rearing often cannot be released successfully.
- Do not assume illness makes an animal safe to handle. A disoriented or non-fleeing wild mammal may be exhibiting neurological symptoms from rabies or other disease. Use gloves and minimize contact regardless of how calm the animal appears.
In the United States, keeping any native wild bird, mammal, or reptile without a state-issued wildlife rehabilitation permit is a federal or state crime depending on the species involved. Migratory birds are protected under the federal Migratory Bird Treaty Act regardless of condition. Even temporarily holding an injured animal—intending to release it—can constitute a violation. The purpose of these laws is animal welfare: trained rehabilitators have the knowledge and resources to give injured wildlife the best chance of survival and successful release.
Opossum-Specific Notes
Opossums have some biology that requires special handling knowledge:
Joeys and the nipple attachment problem: Opossum joeys in early development are permanently attached to the mother's nipple inside the pouch. When a mother opossum is killed—often by a vehicle—joeys found attached to her cannot voluntarily release themselves. Pulling a joey directly off the nipple causes injury. The correct technique is gentle downward rotation of the jaw to release the latch. Any joey found attached to a deceased mother needs immediate rehabilitator care: they will be in various stages of development, require species-specific formula at precise temperatures, and have very little tolerance for error in their care.
The 7-inch rule: Measure from the tip of the nose to the base of the tail (not including the tail itself). A juvenile opossum at or above 7 inches is nutritionally independent and should be released where found after any obvious injuries are evaluated. Below 7 inches, they require a rehabilitator.
Playing dead: An opossum that appears dead, is limp, and has a slack jaw may be in the involuntary tonic immobility response called thanatosis. This can persist for minutes to hours. Before concluding an opossum is dead, watch for breathing movement, check the gum color (pink gums indicate life), and place the animal in a dark box for 30 minutes. Many "dead" opossums recover.
How to Find a Licensed Wildlife Rehabilitator
Rehabilitators are licensed at the state level and often specialize by taxon—some handle only birds, others only small mammals, others only raptors. Getting to the right specialist matters. The following resources are the most reliable starting points:
- National Wildlife Rehabilitators Association (nwrawildlife.org): Maintains a state-by-state directory of member rehabilitators searchable by location and species specialty.
- Wildlife Rehabilitation Information Directory (wildliferehabinfo.org): State-organized listings with contact information and notes on species covered.
- Your state fish and wildlife agency: Every state agency that manages wildlife maintains a list of licensed rehabilitators. Search for your state's fish and wildlife department and navigate to their wildlife rehabilitation page.
- Local veterinarians: Veterinary offices cannot legally treat wildlife without a permit in most states, but they almost always know who the regional rehabilitators are and will provide a contact. This is often the fastest phone call you can make.
- Local humane societies: Many humane societies have established working relationships with wildlife rehabilitators and can provide referrals or may accept the animal for transfer.
When you call, be ready to describe the species (or your best guess), size, visible injuries, and where you found it. This helps the rehabilitator advise whether transport is necessary and prioritize incoming cases appropriately.
How Long Can You Hold an Animal?
The goal is to reach a rehabilitator within 24 hours of finding the animal. Beyond that point, animals that have not received appropriate nutrition and hydration begin declining in ways that are difficult to reverse. Orphaned young are especially vulnerable—a joey or nestling bird held without proper feeding for more than 12 to 18 hours may suffer lasting developmental impacts even if it survives.
If no rehabilitator is reachable within that window, contact your state fish and wildlife agency emergency line for guidance. Some agencies have after-hours contacts for urgent situations.
The best outcome for injured wildlife is almost always the one that gets them to professional hands fastest, with minimal additional stress from handling and incorrect care in the interim. Your role in the first hour is containment, warmth, quiet, and speed—not treatment.