Winter yard clues
Winter strips the yard down to evidence. Snow records every visitor's tracks, bark gnawed at the snow line betrays voles and rabbits, and the scratching that starts in your walls means something moved in when the weather turned. Under the drifts, voles tunnel through the grass all season — spring will reveal their work. Here's how to read winter's clues while they're fresh.
Common winter clues (17)
Animal Droppings Black Droppings on Your Patio: Rat, Mouse, Bat, or Bird? Black droppings on a patio most often come from mice, rats, or bats, with birds and squirrels as runners-up. Mouse droppings are about 1/4 inch with pointed ends, rat droppings run 1/2 to 3/4 inch with blunt ends, and bat droppings look mouse-sized but crumble into shiny insect fragments. Where the droppings sit — piled under the eaves versus scattered along a wall — narrows it down fast. Read the guide → Home Exterior Clues Scratching Noises in Walls at Night: What's Living in There? Scratching in your walls at night most often means mice or rats, since both are nocturnal — light, fast scratching suggests mice, while heavier gnawing and movement suggests rats. If the noise happens in daylight, especially at dawn and dusk, squirrels are the likelier tenant. The time of day, the weight of the sound, and where in the house it comes from will narrow it down before you ever see the animal. Read the guide → Tracks, Nests & Outdoor Clues Animal Tracks in Snow: Identify Your Winter Visitors Animal tracks in snow are most often left by rabbits, squirrels, deer, foxes, or a neighborhood cat or dog. Fresh snow is the best tracking surface your yard will ever offer, and the trail pattern — bounding sets, paired feet, heart shapes, or a dead-straight line — usually identifies the animal faster than any single print. Read the guide → Plant Damage Bark Stripped From Trees: Squirrels, Deer, Voles, or Birds? The height of the damage tells you the most: bark gnawed at ground level is usually voles or rabbits, shredded bark from 1 to 4 feet up is deer rubbing their antlers, and stripped patches on upper branches point to squirrels. Neat horizontal rows of shallow holes are a sapsucker's work — and any damage that circles the whole trunk (girdling) puts the tree at real risk. Read the guide → Bugs & Eggs Brown Egg Sacs on Branches: Mantis, Lanternfly, or Moth? A brown egg case on a branch is either very good news or very bad news: praying mantis egg cases (oothecae) are beneficial and should be left alone, while spotted lanternfly and spongy moth egg masses are invasive pests you should destroy — and in many states, report. Texture and shape tell them apart, so identify before you scrape. Read the guide → Home Exterior Clues Chewed Wires and Screens: Rodent Damage and Fire Risk Chewed wires, cables, and window screens are almost always rodent work — mice, rats, or squirrels, whose front teeth grow continuously and must be worn down by gnawing. The size of the tooth marks and where the damage sits tells you which rodent, and chewed electrical wiring in particular is urgent: exposed conductors inside walls are a genuine fire hazard that needs both an electrician and a pest professional. Read the guide → Animal Droppings Droppings in the Garage: Mouse, Rat, Bat, or Squirrel? Droppings in a garage are most often from mice, with rats, bats, and squirrels as the other usual suspects. Mouse droppings are 1/4-inch pellets with pointed ends scattered along walls and shelves; rat droppings are two to three times larger with blunt ends; bat droppings pile up in one spot beneath a roost near the ceiling or wall top. Before you identify anything, know the cleanup rule: never sweep or vacuum rodent droppings dry. Read the guide → Animal Droppings Droppings in Your Shed: Mouse, Rat, or Something Bigger? Mice are by far the most common source of droppings in a shed — look for 1/4-inch pellets with pointed ends scattered along walls, shelves, and inside boxes. Larger blunt-ended pellets suggest rats, droppings the size of a small dog's point to an opossum, and a smeared brown deposit with a chalky white cap means a snake has been hunting the rodents. Whatever you find, clean it up wet, not dry. Read the guide → Animal Droppings Droppings Under Your Deck: What Animal Is Denning There? Droppings under a deck usually mean an animal is using the space as a den, not just passing through — most often a skunk, opossum, feral cat, or raccoon, and occasionally a groundhog. Skunk droppings are crumbly and full of shiny insect parts, opossum droppings are large and curved, cat droppings are often buried in loose soil, and a pile of tubular droppings in one corner is a raccoon latrine that needs professional-level caution. Timing matters: from spring into midsummer, most of these animals have babies down there. Read the guide → Tracks, Nests & Outdoor Clues Feathers Scattered in Your Yard: What Happened Here? A patch of scattered feathers in your yard usually means one of three things: a hawk plucked a caught bird there, a cat made a kill, or a bird is simply molting. The pattern is the evidence — a dense circle of feathers with no body points to a hawk's plucking post, feathers plus a partially eaten bird points to a cat or a fox, and scattered single feathers appearing over days is just late-summer molt. Read the guide → Home Exterior Clues Greasy Rub Marks Along Walls: The Sign of a Rodent Runway Dark, greasy smudges running in a line along your baseboards, foundation, pipes, or rafters are most likely rub marks — oil and dirt from rodent fur deposited as the animal follows the same route night after night. Prominent, continuous marks usually mean rats; smaller, fainter smudges mean mice. Because rub marks only build up through repeated travel, finding them means a runway is established, not that an animal passed through once. Read the guide → Tracks, Nests & Outdoor Clues Pile of Sticks in a Tree: Squirrel Drey or Bird Nest? A large clump of sticks or leaves high in a tree is usually either a squirrel drey — a messy ball of leaves and twigs wedged into a fork — or a platform nest built by a hawk or crow. The quickest tell is the material and shape: dreys are leafy and roughly spherical, while raptor and crow nests are flatter platforms of bare sticks. Winter, when the leaves drop, is when most homeowners suddenly notice them. Read the guide → Tracks, Nests & Outdoor Clues Small Animal Tracks in Your Yard: How to Read Them Small animal tracks in your yard most often belong to rabbits, squirrels, raccoons, opossums, skunks, or a neighborhood cat or dog. Counting the toes, checking whether claw marks show, and looking at how the prints are grouped will identify the visitor faster than the shape of any single print. Read the guide → Animal Droppings Small Pellet Droppings in Yard: Rabbit, Deer, or Squirrel? Small pellet droppings scattered across a yard are most often left by rabbits, deer, or squirrels. Rabbits drop round, pea-size pellets in loose clusters on the lawn, deer leave larger oval pellets in concentrated piles of 20 or more, and squirrel droppings are barrel-shaped and scattered under trees. Where the pellets show up — open lawn versus garden edge — is as telling as their shape. Read the guide → Yard Holes Tunnels in Grass: Mole or Vole? How to Tell in Seconds Tunnels in a lawn come in two distinct styles: raised, spongy ridges you can feel underfoot are mole feeding tunnels just below the surface, while flat, worn trails clipped into the grass itself are vole runways. Moles hunt worms and grubs under your turf; voles eat the grass and bark on top of it — so telling them apart decides everything about what to do next. Read the guide → Home Exterior Clues Woodpecker Holes in Siding: Why They Drill and How to Stop It Holes pecked in your siding usually mean a woodpecker is foraging for insects, drumming to claim territory, or excavating a nest cavity — and rows of small holes often signal that insects like carpenter bee larvae are already living in the wood. A single clean half-inch round hole with sawdust below it, on the other hand, is typically the work of carpenter bees themselves. Because woodpeckers are federally protected, the fix is deterrence and repair, never harm. Read the guide → Mushrooms & Growths Yellow Mushrooms in Potted Plants: Harmless or a Problem? Bright yellow mushrooms popping up in a potted plant are almost certainly Leucocoprinus birnbaumii, the flowerpot parasol — a tropical fungus that rides into your home in potting soil and fruits when conditions turn warm and moist. It won't hurt your plant at all; it lives on decaying organic matter in the mix, not on roots. The only real concern is that the mushrooms are toxic if eaten, so households with small children or pets that nibble should remove them. Read the guide →