NWCO - Nuisance Wildlife Control Operator Wildlife Species Identification Questions and Answers — Questions and Answers
Question 1: A client reports finding tracks in the soft soil near their garbage cans. The tracks are about 2-3 inches across, show five toes pointing forward on both front and hind feet, and resemble small human handprints. Which animal is the most likely culprit?
- Opossum
- Raccoon (Correct answer)
- Striped Skunk
- Domestic Cat
Correct answer: Raccoon
Raccoon tracks are distinctive and often described as looking like small human hands. They have five long, thin toes on both their front and hind feet, all of which point forward. Opossum tracks also have five toes, but the rear track has a large, opposable thumb-like toe that angles out to the side. Skunk tracks have five toes but are generally smaller with visible claw marks. Cat tracks only show four toes and do not have claw marks as they are retractable.
Question 2: You are called to a property to identify the source of droppings in an attic. The droppings are dark, about 1/4 to 1/2 inch long, and found in piles. When gently crushed (using appropriate PPE), they crumble into a dusty powder revealing shiny, metallic-looking fragments. What is the source of these droppings?
- Norway Rat
- House Mouse
- Bat (Correct answer)
- Flying Squirrel
Correct answer: Bat
Bat droppings, or guano, are primarily composed of insect exoskeletons. This diet results in droppings that are easily crumbled and contain shiny, undigested insect parts. Mouse and rat droppings are harder and more solid; they will not crumble into a powder when crushed. While flying squirrel droppings can be similar in size, they do not have the same composition and will not exhibit the shiny fragments characteristic of an insect diet.
Question 3: A homeowner describes a burrow entrance next to their shed. The hole is approximately 8 inches in diameter, and there is a large mound of freshly excavated dirt fanned out in front of it, often described as a 'porch'. Which of the following animals is the most likely creator of this burrow?
- Skunk
- Chipmunk
- Norway Rat
- Woodchuck (Groundhog) (Correct answer)
Correct answer: Woodchuck (Groundhog)
Woodchuck (or groundhog) burrows are characterized by a main entrance that is typically large (around 8-12 inches) and has a significant mound of excavated soil, often called a 'dirt porch,' directly in front of it. Skunks may burrow under structures, but their holes are generally smaller and less conspicuous. Chipmunk and rat burrows are much smaller, typically only 2-3 inches in diameter.
Question 4: When attempting to identify a snake in North America, which of the following is the LEAST reliable single characteristic for distinguishing a venomous snake from a non-venomous one?
- Presence of a pit between the eye and nostril
- Pupil shape (elliptical vs. round)
- Triangular or spade-shaped head (Correct answer)
- Presence of a rattle on the tail
Correct answer: Triangular or spade-shaped head
Many non-venomous snakes can flatten their heads to appear more triangular as a defensive mechanism, making head shape an unreliable indicator on its own. While many pit vipers have elliptical pupils and triangular heads, there are exceptions, and many harmless snakes can mimic these features. The presence of a heat-sensing pit is a definitive characteristic of pit vipers (all venomous snakes in many regions). A rattle is a definitive sign of a rattlesnake, which is venomous.
Question 5: A client in a suburban area reports hearing a variety of high-pitched vocalizations at night, including a mix of yips, barks, and group howls that seem to come from multiple animals. Which species is most known for this complex and varied vocal repertoire?
- Red Fox
- Raccoon
- Coyote (Correct answer)
- Opossum
Correct answer: Coyote
Coyotes are known for their wide range of vocalizations, which include yips, barks, and group howls. A few coyotes howling together can often sound like a much larger pack due to the variety of sounds they produce. While red foxes have a range of calls, they are better known for sharp barks and occasional screams, not prolonged group howling. Raccoons and opossums are generally much less vocal and do not howl.
Question 6: Upon inspection of a damaged roof soffit, you find gnaw marks and a collection of nuts stored in the attic insulation. The entry point is a clean, chewed hole about the size of a baseball. Which animal is the most likely cause of this damage?
- Raccoon
- Squirrel (Correct answer)
- Opossum
- Bat
Correct answer: Squirrel
Squirrels are rodents known for their powerful incisors and constant need to gnaw. They commonly chew holes through wood, including soffits and fascia boards, to gain access to attics for nesting and food storage. Finding a cache of nuts is a classic sign of squirrel activity. Raccoons would create a much larger, more torn-apart entry point. Opossums are less likely to gnaw through wood, preferring to use existing openings. Bats do not gnaw and require only very small existing gaps to enter.
NWCO - Nuisance Wildlife Control Operator Wildlife Species Identification Questions and Answers
A client reports finding tracks in the soft soil near their garbage cans.
The tracks are about 2-3 inches across, show five toes pointing forward on both front and hind feet, and resemble small human handprints.
Which animal is the most likely culprit?