Leaves Chewed From the Edges: How to Read the Bite Marks

Leaves eaten inward from the edges are usually caterpillars, grasshoppers, or — if the edges show neat crescent-shaped notches — adult weevils feeding at night. When whole leaf sections or stems are missing, the cut itself is the clue: a clean angled snip means rabbits, while ragged torn edges mean deer.

Most likely causes

  • Caterpillars — smooth scalloped bites working in from the edge, droppings on leaves below
  • Grasshoppers — big ragged chunks from edges, worst in hot dry late summer
  • Weevils — uniform crescent-shaped notches around the leaf margin, feeder never visible by day
  • Rabbits — stems and leaves clipped off cleanly at a 45-degree angle, low on the plant
  • Deer — torn, ragged stem ends and missing foliage from knee height upward

Compare the possible causes

Possible cause Key signs When it happens How likely
Caterpillars Smooth, rounded bites eaten inward from the leaf edge, growing larger each day, with pepper-like droppings on foliage below Spring through early fall, tracking each species' egg-laying season Very common
Grasshoppers Large, ragged chunks missing from leaf edges across many unrelated plants, with the culprits visible jumping ahead of you Mid to late summer, worst in hot, dry years and near unmowed grassy areas Common
Adult weevils (black vine weevil and relatives) Neat, uniform crescent-shaped notches all around the leaf margins, especially on rhododendrons, azaleas, and other broadleaf evergreens Nighttime feeding from late spring through summer Common
Rabbits Stems and leaves snipped off cleanly at a sharp angle, all damage within about 2 feet of the ground, pea-sized round droppings nearby Year-round, with tender spring growth and winter scarcity the peak periods Common
Deer Ragged, torn, or shredded stem ends where foliage was pulled off, from about knee height up to 6 feet Dawn, dusk, and overnight in any season; heaviest in late winter and during summer droughts Common

Visual clues to check

  • Examine the cut ends with a magnifier: smooth angled cuts mean rabbit, ragged tears mean deer, scalloped bites mean an insect
  • Measure the height of the highest damage — rabbit damage stops near 2 feet, deer damage runs from knee height to 6 feet
  • Look for uniform crescent notches rimming the whole leaf edge, the signature of night-feeding weevils
  • Check under leaves and along stems for caterpillars, and on the ground below for their dark droppings
  • Do a dusk or after-dark flashlight patrol — weevils, many caterpillars, and browsing rabbits are all most active then
  • Scan the soil for tracks and scat: round pea-sized pellets say rabbit, larger oval pellet piles and split hoofprints say deer

The causes in detail

Caterpillars

Most caterpillars anchor themselves on the leaf margin and eat inward, leaving scalloped, smooth-edged bites. The feeding accelerates dramatically as they grow — a nearly full-grown caterpillar eats more in its final few days than in its whole life before. Search leaf undersides and stems near the newest damage, and check at dusk if you find nothing by day.

Grasshoppers

Grasshoppers are indiscriminate — where a caterpillar species sticks to its host plants, grasshoppers will rough up vegetables, flowers, and shrubs alike. Their bites are bigger and messier than caterpillar feeding, often taking out chunks of vein and all. Pressure builds from midsummer on, migrating in from dry, weedy margins, so damage that starts at the garden edge nearest a field is a strong clue.

Adult weevils (black vine weevil and relatives)

Weevil notching looks like someone went around the leaf edge with a tiny ticket punch — the notches are oddly regular compared to any caterpillar's work. The adults hide in mulch and soil litter by day and climb up to feed only after dark, so you'll almost never catch one in daylight. The notching itself is cosmetic; the bigger concern is their soil-dwelling larvae, which feed on roots.

Rabbits

A rabbit's paired incisors cut like garden shears, leaving a smooth 45-degree slice you could mistake for pruning. Because rabbits can't reach high, the damage line stops abruptly around 2 feet — an obvious tell when a shrub is stripped at the bottom and untouched above. Scattered round droppings and tufts of fur seal the identification.

Deer

Deer have no upper front teeth, so they clamp and yank, tearing stems instead of cutting them — the ends look frayed. They browse a bite here and a bite there across many plants rather than finishing one, and hoofprints or oval pellet piles in soft soil confirm the visit. Damage above 2.5 feet rules out rabbits entirely.

When to worry

  • A newly planted tree or shrub losing most of its foliage — young plants have few reserves to regrow from
  • Weevil notching on rhododendrons paired with a plant that wilts despite moist soil, which can mean root damage from weevil grubs below
  • Deer browsing that returns nightly — once a feeding route is established, damage compounds fast
  • Grasshopper feeding stripping vegetable plants faster than they can regrow in late summer

What to do now

  1. Match the bite pattern to the feeder before treating anything — mammal damage and insect damage have completely different fixes
  2. Handpick caterpillars and grasshoppers in the early morning when they're cold and slow
  3. For weevils, lay a sheet under the shrub after dark and shake the branches — adults drop when disturbed and can be collected
  4. Exclude rabbits with a 2-foot chicken-wire cylinder anchored a few inches into the soil so they can't push under
  5. For deer, repellent sprays help short-term, but netting or fencing at least 6 feet tall is the only reliable answer
  6. Mow or trim weedy margins near the garden to cut down grasshopper habitat
  7. If a mature shrub keeps declining despite your fixes, have a certified arborist or extension agent inspect it — root-feeding larvae may be the real issue

What not to do

  • Don't spray insecticide at damage that turns out to be rabbit or deer browsing — it does nothing and harms beneficial insects
  • Don't assume an insect is guilty just because you can't see a mammal; both feed mostly at night
  • Don't stack repellents on edible crops without checking they're labeled for vegetables
  • Don't remove every chewed leaf — partially eaten leaves still photosynthesize and feed recovery

Think you know the suspect?

These animals commonly cause this clue — see their full sign profiles:

Frequently asked questions

How can I tell rabbit damage from deer damage?

Look at the cut and the height. Rabbits slice stems cleanly at a 45-degree angle, like pruning shears, and never reach above about 2 feet. Deer tear and shred stem ends because they lack upper front teeth, and their damage runs from knee height up to 6 feet. Droppings confirm it: small round pellets for rabbits, larger oval pellet piles for deer.

What makes small half-circle notches all around my rhododendron leaves?

That regular notching is adult weevil feeding, most often black vine weevil. The beetles hide in soil litter by day and feed after dark, which is why you never see them. The notches are cosmetic, but it's worth monitoring the plant's vigor, since the weevil's larvae feed on roots underground.

Why is something eating every plant in my garden, not just one kind?

Broad, indiscriminate edge feeding across unrelated plants usually means grasshoppers in late summer or deer at any time. Most caterpillars and beetles specialize in particular plant families, so damage spread across everything points to a generalist. Check for grasshoppers jumping ahead of you at midday and for hoofprints in soft ground.

Will edge-chewed leaves hurt my plant long-term?

Rarely. A leaf that loses part of its edge keeps working, and healthy plants tolerate losing a quarter of their foliage without measurable harm. The real risks are repeated defoliation of the same plant, heavy feeding on new transplants, and hidden root damage — those are the cases worth acting on.

Related yard clues

Plant Damage Skeletonized Leaves: What Eats Everything but the Veins? Leaves chewed down to a lacy network of veins are usually the work of Japanese beetles or sawfly larvae such as rose slugs and pear slugs. Japanese beetles feed in plain sight in daytime swarms during midsummer, while sawfly larvae hide on leaf undersides and 'window-pane' the leaf from below — and stippled, bleached leaves that aren't actually eaten point to lace bugs instead. Read the guide → Plant Damage Round Holes in Leaves: Bee, Beetle, Slug, or Caterpillar? Perfectly circular holes or half-moon notches cut from leaf edges are almost always leafcutter bees, which are beneficial pollinators that do no lasting harm. Rounded but irregular holes in the middle of leaves point instead to slugs, caterpillars, or — if the holes are tiny and numerous — flea beetles. Read the guide → Plant Damage Flowers Eaten Overnight: Who Raided Your Garden Beds? Flowers that vanish overnight are most often deer or rabbits, and which flowers were taken narrows it fast — tulip and hosta blooms nipped off whole point to deer, while low plants clipped at a clean angle point to rabbits. Petals riddled with ragged holes but still attached usually mean earwigs or slugs working after dark, and shredded rose blooms are Japanese beetles feeding into dusk. Read the guide → Plant Damage Plant Stems Cut Near the Ground: Cutworms or Rabbits? A seedling toppled with its stem severed right at the soil line is the classic signature of cutworms, night-feeding caterpillars that curl in the soil by day. Clean 45-degree cuts a few inches higher point to rabbits, while stems gnawed through at the base — often with the plant left uneaten — suggest voles or, less often, squirrels. Read the guide →

Still not sure? Compare with these clues

Bugs & Eggs Green Caterpillars on Plants: Which One Is Eating Yours? The green caterpillar on your plants is most likely a cabbage worm if it's on broccoli or kale, a tomato hornworm if it's large and has a tail spike, or a sawfly larva if it's on roses. Which plant is being eaten narrows it down fast, and handpicking plus row covers handle most of them — no spraying required. Keep in mind that some green caterpillars grow up to be butterflies worth keeping around. Read the guide → Plant Damage What Is Eating My Tomato Leaves at Night? Tomato leaves that disappear overnight are most often the work of tomato hornworms, cutworms, slugs, or flea beetles — and if whole branches are gone, rabbits or deer. The size of the bites, whether there are slime trails, and how low on the plant the damage sits will point you to the culprit, and a ten-minute flashlight check after dark usually confirms it. 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 → Plant Damage Holes in Hosta Leaves: Slugs, Earwigs, Hail, or Deer? Holes in hosta leaves are most often slug feeding — hostas are the slug's favorite plant in the American shade garden, and silvery slime trails confirm it. Earwigs chew similar ragged holes in hot dry spells, hail punches holes with bruised edges all on the same date, and deer skip the holes entirely and eat whole leaves down to the stalks. Read the guide →