The first cool morning of fall can feel like a gift, bringing people outside to enjoy the fresh air. But as the weather changes, some of the yard’s less welcome neighbors become active, too.
Across Texas, venomous insects, spiders and snakes may be found under flowerpots, woodpiles, porch steps and fallen leaves. Knowing what to look for—and where these animals tend to hide—can help gardeners stay calm and take sensible precautions.
Puss caterpillar aka Asp
Shaped like a tiny furry toupee, the puss caterpillar looks soft enough to touch. That silky coat hides venomous spines capable of delivering one of the most painful stings in North America.
Also known as the asp, the southern flannel moth caterpillar often appears in greater numbers during fall, particularly on oaks and elms, according to Texas A&M AgriLife. It may cling to tree trunks, shrub branches, fence rails or picnic tables. Colors range from cream to rusty orange to gray, and the caterpillar grows to about an inch long.
A sting can cause sharp, throbbing pain that spreads up an arm within minutes. Red, grid-like marks, swelling, headache or an upset stomach may also occur. Clear tape gently pressed to the affected area and lifted away can help remove broken spines. An ice pack may ease the pain. Seek medical care if symptoms are severe or get worse.
Children may be tempted to collect caterpillars, so remind them to look but not touch. Gardeners should wear gloves while pruning shrubs or raking leaves under oak trees. Cocoon cases on bark may also hold loose spines.
Striped bark scorpion
Under a black light, scorpions glow blue-green, making nighttime yard checks an unusual fall activity. The striped bark scorpion is the state’s most common species and can remain active as the weather cools.
Look for a yellowish-tan body with two dark stripes running down its back. Adults are usually about 2 to 2½ inches long, including the curled stinger. As nights cool, scorpions may enter garages, attics and closets in search of shelter and insects. They climb walls, so one may turn up in a bathtub or on a ceiling.
A sting typically feels like a hot needle jab and may cause local swelling, tingling or numbness. Serious reactions are uncommon, but young children, older adults and people with allergies should get medical help promptly.
Shake out shoes, gloves and towels before using them. Sealing gaps around doors and windows, moving firewood away from the house and trimming plants back from exterior walls can help reduce the chances of scorpions getting indoors. Wear gloves when lifting stones or flowerpots, and use a flashlight to check dark areas at night.
Brown recluse
The brown recluse has six eyes instead of eight, though seeing that feature would require getting uncomfortably close. Many people recognize it by the dark violin-shaped marking on its back, which points toward the spider’s rear.
Its body ranges from light tan to grayish brown. The legs are long, thin and evenly colored, without bands. Outdoors, brown recluses hunt at night under bark, rocks and boards. They may stay active year-round inside climate-controlled homes.
Cooler weather can bring them into garages, closets, attics and storage boxes. Holiday decorations brought down from storage may provide hiding places, so open boxes carefully. Bites are often painless at first. Most heal on their own, but some develop into slow-healing sores that need medical attention. Spiders generally bite in self-defense, often when trapped against skin in clothing or bedding.
Shake out stored jackets and garden gloves before wearing them. Sticky traps along walls or behind furniture can help show whether spiders are present. Storing items in sealed plastic bins instead of cardboard boxes also reduces hiding places.
Black widow
The black widow’s familiar red hourglass marking is on the underside of its abdomen, so it may be easiest to see when the spider is hanging upside down in its web. Females have shiny black bodies about half an inch long, with legs spanning roughly 1½ inches.
Their tangled webs are often found in sheltered, low spots, including beneath deck rails or inside water meter boxes. Activity typically peaks from late summer into fall. Females produce papery egg sacs that may overwinter until spring.
As temperatures drop, black widows may move into sheds, garages and crawl spaces. Woodpiles stacked against a house can also provide hiding places. Wear thick gloves when handling firewood, and avoid reaching blindly beneath patio furniture or into old flowerpots.
Black widow venom affects the nervous system and can cause severe muscle pain, abdominal cramping and heavy sweating. Bites are rarely life-threatening for healthy adults, but children and older adults should receive prompt medical care. Wash the bite with soap and water and apply a cool compress while contacting a medical professional or poison control for guidance. Males are smaller and lighter in color and pose less risk than females.
Copperhead
Young copperheads use the bright yellow tips of their tails to lure frogs and lizards. Many are born from late August through October, so fall can bring more snakes into yards.
Adults are usually 2 to 3 feet long, with pale tan-to-copper bodies marked by darker, hourglass-shaped bands. Their coloring blends easily with fallen leaves. Copperheads are most active in spring and fall. In autumn, males may travel farther while searching for mates. As nights cool, copperheads may also be active during the day, warming themselves in the sun.
Leaf piles, mulch beds and stacked lumber are common hiding places. Many bites happen when someone accidentally steps on or grabs a snake. Look carefully before reaching into yard debris, and wear sturdy boots and use a flashlight on evening walks.
Copperhead bites can be painful and cause swelling. Seek medical care promptly, keep the person calm and still, and avoid cutting the wound, sucking out venom or applying ice. Copperheads also eat mice and insects, so giving one plenty of space to move away is usually the safest response.
Texas coral snake
A common rhyme says, “Red touches yellow,” but color patterns can be easy to misread. In Texas, the coral snake’s red and black bands are separated by narrow yellow bands. Harmless lookalike snakes, including milk snakes, generally have red bands touching black instead. Keep a safe distance rather than relying on a rhyme to identify a snake.
The Texas coral snake has a slender body circled by red and black bands with thin yellow bands between them. Adults typically reach about 2 feet long and have a small black snout. Young snakes, about 6 or 7 inches long, may also appear in flower beds during autumn.
Cool, sunny fall mornings can bring coral snakes out to hunt beneath leaf litter and rotting logs. They feed mainly on other small snakes and lizards and may stay hidden in thick ground cover.
Coral snake venom affects the nervous system, and symptoms may be delayed for hours. Anyone bitten should seek emergency care immediately, even if they feel fine. Coral snakes are shy and rarely bite unless handled. Keep children away, wear gloves while weeding shaded beds and use long tools when raking leaves.
Cottonmouth
Also called water moccasins, cottonmouths are heavy-bodied pit vipers found near creeks and ponds across the eastern half of Texas. When threatened, they may open their mouths to reveal a bright white lining—a warning to back away and give the snake space.
Adults are often dark olive, brown or nearly black, and older snakes may lose their banding. Like other pit vipers, cottonmouths have heat-sensing pits between their eyes and nostrils. Their thick bodies and blocky heads can help distinguish them from harmless water snakes, but identification from a distance can be difficult.
In fall, cottonmouths may search for warm places to rest and shelter for winter. Sunny banks, rock piles and fallen logs near water can be basking spots on cool afternoons. Many harmless water snakes are mistaken for cottonmouths, so seeing a snake in the water does not necessarily mean it is dangerous.
A cottonmouth bite is a medical emergency. Call 911 or get to a hospital right away. Keep the person calm and still, and remove rings or tight items before swelling begins. Wear boots near ponds and creeks, and look carefully before stepping over logs or reaching into tall grass.
Western diamondback rattlesnake
The western diamondback’s buzzing rattle is one of nature’s clearest warnings. These snakes can grow longer than 5 feet and are among the region’s largest venomous snakes.
Their gray-to-brown bodies have dark diamond-shaped markings outlined by lighter scales. Bold black-and-white bands around the tail, sometimes called a “coon tail,” appear just before the rattle.
In fall, western diamondbacks may seek winter dens in rocky crevices, old burrows or spaces beneath buildings. On cool mornings, they may bask on warm rocks, roads and sunny trails. That can put them near hikers, ranchers and gardeners during pleasant October afternoons. Watch where you place your hands and feet around rock walls, brush piles and tall grass.
Rattlesnakes may strike without rattling, so silence does not mean an area is clear. A bite requires immediate emergency care; treatment at a hospital may include antivenom. Keep the person calm while help is on the way. Do not apply a tourniquet or cut the wound. A photo may help medical staff identify the snake, but do not approach or try to catch it.
Giving a rattlesnake a wide berth is the safest choice for people and the animal.
Taking Care is the Key to Yard Safety
Fall yard work does not have to turn into a close encounter. Wear gloves and sturdy shoes, use a flashlight after dark, and check leaves, firewood and stored items before reaching in. If you spot a venomous animal, give it room and keep children and pets away. When a bite or sting occurs, seek medical advice promptly.
