NWCO - Nuisance Wildlife Control Operator Nuisance Wildlife Control Operator Wildlife Damage Identification 1 — Questions and Answers
Question 1: Claw marks scratched into the bark of a tree reaching 6 to 8 feet above ground, accompanied by tufts of coarse hair caught in the rough bark, most likely indicate activity by which animal?
- White-tailed deer using the tree as an antler rub
- Black bear using the tree as a scent-marking post (Correct answer)
- Raccoon repeatedly climbing to an overhead den
- Porcupine stripping bark for cambium feeding
Correct answer: Black bear using the tree as a scent-marking post
Black bears stand upright and rake their claws down tree trunks as territorial scent-marking behavior, leaving deep parallel gouges well above deer-height and often depositing hair from their shoulders and back.
Question 2: A poultry house is found with a hole approximately 2 inches in diameter chewed through the base of a wooden wall, several birds killed but only partially consumed, and small, elongated scat nearby. The most likely predator is:
- Red fox
- Great horned owl
- Mink or long-tailed weasel (Correct answer)
- Raccoon
Correct answer: Mink or long-tailed weasel
Mink and weasels can compress their bodies through openings as small as 1.5–2 inches, and their hunting behavior often results in multiple kills in a single night with partial consumption, distinguishing them from larger predators that require bigger entry points.
Question 3: Small, cone-shaped excavations roughly 3 to 4 inches wide and 2 to 3 inches deep are scattered across a lawn with virtually no displaced soil mound near the holes. This foraging sign is most characteristic of which animal?
- Eastern mole
- Skunk (Correct answer)
- Groundhog
- Armadillo
Correct answer: Skunk
Skunks dig neat, inverted-cone-shaped holes when rooting for grubs and beetle larvae just below the turf surface; unlike moles they do not create soil ridges, and unlike groundhogs they leave no large mound because they scatter small amounts of soil as they work.
Question 4: Multiple young orchard trees show a ring of gnawed bark removed from the lower 6 inches of their trunks during winter, with narrow incisor marks approximately 3 mm wide and the damage hidden beneath snow level. The most probable cause is:
- Porcupine feeding on cambium
- Cottontail rabbit girdling
- Meadow vole girdling (Correct answer)
- White-tailed deer browsing
Correct answer: Meadow vole girdling
Meadow voles travel beneath snow in runways and girdle tree trunks at or just below the snow surface, leaving very narrow tooth marks (about 3 mm) compared to the wider marks of rabbits or the high-elevation damage of porcupines.
Question 5: At the edge of a stocked fish pond, an inspector finds several large fish carcasses with the head and front third of the body neatly consumed while the tail section remains intact, along with fresh five-toed webbed tracks. The most likely predator is:
- Great blue heron
- Snapping turtle
- River otter (Correct answer)
- Mink
Correct answer: River otter
River otters characteristically haul fish onto shore and consume the head and anterior portion first, leaving the rear section uneaten; their large, five-toed webbed tracks and the consistent partial-consumption pattern distinguish their predation from heron spearing or turtle ambush.
Question 6: A homeowner reports finding a concentrated pile of feathers in an open area of the yard with no blood, no carcass, and no signs of a struggle beyond the feather cluster. This evidence most strongly points to predation by:
- A domestic cat
- A red-tailed hawk or similar raptor (Correct answer)
- A coyote
- An opossum
Correct answer: A red-tailed hawk or similar raptor
Raptors routinely pluck prey before feeding, creating a distinct 'plucking post' where feathers accumulate with minimal blood loss; cats and canids typically carry prey away or leave blood and tissue, while opossums are rarely primary bird predators.
NWCO - Nuisance Wildlife Control Operator Nuisance Wildlife Control Operator Wildlife Damage Identification 1
Claw marks scratched into the bark of a tree reaching 6 to 8 feet above ground, accompanied by tufts of coarse hair caught in the rough bark, most likely indicate activity by which animal?