How to Identify Mountain Lion in Delaware
No, you won't find mountain lions in Delaware. These large predators were hunted to extinction across the eastern United States by the 1800s and have never returned. While mountain lions are impressive animals found in western and a few southeastern states, they have been absent from Delaware for over a century. If you're interested in large cats that actually live in Delaware, the state's bobcats are a far smaller but still impressive wild predator you may encounter in forests and brushy areas.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself.
Real sighting data, source iNaturalist
Only 0 verified observations on iNaturalist of mountain lion have been logged in Delaware, which fits how rare they are in the state. That low number is itself the most honest answer to whether you are likely to see one here.
No, you won't find mountain lions in Delaware. These large predators were hunted to extinction across the eastern United States by the 1800s and have never returned. While mountain lions are impressive animals found in western and a few southeastern states, they have been absent from Delaware for over a century. If you're interested in large cats that actually live in Delaware, the state's bobcats are a far smaller but still impressive wild predator you may encounter in forests and brushy areas.
What does a mountain lion look like?
Mountain lions are large muscular cats with tawny or grayish-brown fur, standing about 27 to 32 inches tall at the shoulder and weighing 120 to 220 pounds in males. They have long slender tails roughly a third of their body length, small rounded ears, and a stocky build designed for power and climbing. Adults are uniformly colored with no spots or stripes, and their face tapers to a narrow muzzle. Females are noticeably smaller than males, often weighing around 100 pounds.
Could a mountain lion ever show up in Delaware?
Extremely unlikely. Mountain lions require vast territories, typically 50 to 100 square miles per animal in the west. Delaware is only 2,400 square miles total with dense human development, fragmented forests, and no large prey base like elk or deer in sufficient numbers. Even when young male lions disperse from established western populations, they rarely travel east of the Great Plains, and there are no natural corridors or habitat for them to survive. The nearest wild population is the tiny Florida panther group over 1,000 miles south, which is critically endangered and managed intensively.
Why were mountain lions eliminated from the East?
Starting in colonial times, European settlers viewed mountain lions as threats to livestock and human safety and systematically hunted them to elimination. By the mid-1800s, bounties and unregulated killing had wiped out all eastern populations. Unlike wolves or bears, which have shown some ability to recolonize areas in recent decades, mountain lions have never naturally reestablished east of the Great Plains because the landscape is too developed and fragmented to support their territorial needs.
What large predators actually live in Delaware?
Delaware's largest native predator is the bobcat, a wild cat weighing 15 to 40 pounds with a spotted coat, tufted ears, and a short black-tipped tail. Bobcats hunt rabbits, hares, rodents, and birds in Delaware's forests and shrublands. They are solitary, nocturnal, and rarely seen. Coyotes also hunt in Delaware and have expanded their range across the eastern states over the past few decades, weighing 30 to 40 pounds and resembling a small wolf. Both bobcats and coyotes are far smaller and less powerful than mountain lions but are genuine wild predators thriving in the state.
How would you tell a mountain lion from a bobcat?
The differences are striking. Mountain lions are enormous compared to bobcats, weighing 5 to 10 times more and standing far taller at the shoulder. Mountain lions have long thick tails, while bobcats have short stubby tails with black tips. Bobcats have distinctive tufted ears and a spotted coat, while mountain lions are uniformly colored with smooth edges on their ears. Bobcats are common in Delaware's forests; mountain lions are not present anywhere east of the Great Plains.
Are mountain lions in any eastern states?
Mountain lions are absent throughout the entire eastern United States except for a small endangered population in Florida known as the Florida panther. This group numbers fewer than 200 individuals confined to a few protected areas in southern Florida and has never expanded north. All other eastern mountain lion sightings reported to wildlife agencies are either misidentified animals such as large coyotes or bobcats, or extremely rare young males that disperse from western populations and do not establish breeding populations. No breeding population of mountain lions exists east of South Dakota and Nebraska.
What should you do if you think you see a mountain lion in Delaware?
Contact the Delaware Division of Fish and Wildlife immediately. The animal is almost certainly a coyote, bobcat, or large domestic dog that was misidentified in dim light or from a distance. Wildlife officials are trained to investigate and can determine what you actually saw. Photographs or video are very helpful. Mountain lions have such distinctive appearances and require such large territories that a confirmed sighting in Delaware would be an unprecedented event worthy of immediate scientific and media attention, but the odds are effectively zero based on over a century of absence.
Conservation status, source NatureServe
Conservation rank for mountain lion (Cougar, Puma concolor), as assessed by NatureServe Explorer.
| Scope | NatureServe rank | Meaning |
|---|---|---|
| In Delaware | SX | Presumed Extirpated |
| Global (rangewide) | G5 | Secure |
NatureServe ranks run from 1 (critically imperiled) to 5 (secure). See our data methodology for how this is sourced.
Frequently asked questions
What does a mountain lion look like?+
Mountain lions are large muscular cats with tawny or grayish-brown fur, standing about 27 to 32 inches tall at the shoulder and weighing 120 to 220 pounds in males. They have long slender tails roughly a third of their body length, small rounded ears, and a stocky build designed for power and climbing. Adults are uniformly colored with no spots or stripes, and their face tapers to a narrow muzzle. Females are noticeably smaller than males, often weighing around 100 pounds.
Could a mountain lion ever show up in Delaware?+
Extremely unlikely. Mountain lions require vast territories, typically 50 to 100 square miles per animal in the west. Delaware is only 2,400 square miles total with dense human development, fragmented forests, and no large prey base like elk or deer in sufficient numbers. Even when young male lions disperse from established western populations, they rarely travel east of the Great Plains, and there are no natural corridors or habitat for them to survive. The nearest wild population is the tiny Florida panther group over 1,000 miles south, which is critically endangered and managed intensively.
Why were mountain lions eliminated from the East?+
Starting in colonial times, European settlers viewed mountain lions as threats to livestock and human safety and systematically hunted them to elimination. By the mid-1800s, bounties and unregulated killing had wiped out all eastern populations. Unlike wolves or bears, which have shown some ability to recolonize areas in recent decades, mountain lions have never naturally reestablished east of the Great Plains because the landscape is too developed and fragmented to support their territorial needs.
What large predators actually live in Delaware?+
Delaware's largest native predator is the bobcat, a wild cat weighing 15 to 40 pounds with a spotted coat, tufted ears, and a short black-tipped tail. Bobcats hunt rabbits, hares, rodents, and birds in Delaware's forests and shrublands. They are solitary, nocturnal, and rarely seen. Coyotes also hunt in Delaware and have expanded their range across the eastern states over the past few decades, weighing 30 to 40 pounds and resembling a small wolf. Both bobcats and coyotes are far smaller and less powerful than mountain lions but are genuine wild predators thriving in the state.
How would you tell a mountain lion from a bobcat?+
The differences are striking. Mountain lions are enormous compared to bobcats, weighing 5 to 10 times more and standing far taller at the shoulder. Mountain lions have long thick tails, while bobcats have short stubby tails with black tips. Bobcats have distinctive tufted ears and a spotted coat, while mountain lions are uniformly colored with smooth edges on their ears. Bobcats are common in Delaware's forests; mountain lions are not present anywhere east of the Great Plains.
Are mountain lions in any eastern states?+
Mountain lions are absent throughout the entire eastern United States except for a small endangered population in Florida known as the Florida panther. This group numbers fewer than 200 individuals confined to a few protected areas in southern Florida and has never expanded north. All other eastern mountain lion sightings reported to wildlife agencies are either misidentified animals such as large coyotes or bobcats, or extremely rare young males that disperse from western populations and do not establish breeding populations. No breeding population of mountain lions exists east of South Dakota and Nebraska.
What should you do if you think you see a mountain lion in Delaware?+
Contact the Delaware Division of Fish and Wildlife immediately. The animal is almost certainly a coyote, bobcat, or large domestic dog that was misidentified in dim light or from a distance. Wildlife officials are trained to investigate and can determine what you actually saw. Photographs or video are very helpful. Mountain lions have such distinctive appearances and require such large territories that a confirmed sighting in Delaware would be an unprecedented event worthy of immediate scientific and media attention, but the odds are effectively zero based on over a century of absence.
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