predator proof livestock enclosures Archives

History

Since the late 1850’s, North America’s big cat has been known as the mountain lion. Early Spanish explorers called it ‘gato monte‘ which means cat of the mountain.

Latin America calls it puma (powerful) which comes from the 16th century Peruvian Quechua language.

Because of its wide range, diverse habitats, and the span of human cultural locations, this animal is known by many other names including; cougar, panther, and catamount.

Geographic Habitat

California’s current mountain lion population is between 4,000 – 6,000 animals.

Closely related to the house cat, these big cats are adaptable to a large variety of ecosystems. In the Nevada County portion of the Sierra Nevadas, they like dense underbrush and rocky outcropping habitats.

Highly territorial, males generally claim a 150 square mile area that may vary depending on terrain and prey availability. Females have smaller territories, about half the size, and they stay in the general proximity of their mothers.

“Wherever you see deer in the state, there’s also going to be cougars.” – Chris Wilmers, Wildlife Ecologist, UC Santa Cruz

Characteristics

Mountain lions are the world’s fourth-largest big cat weighing between 150 – 200 lbs. (1. Siberian Tiger | 900 lbs. 2. African Lion | 600 lbs. 3. Jaguar | 300 lbs.)
While the mountain lion is an apex predator, it will sometimes give ground to black bears.
These cats can swim, although this is not a favorite activity.
Hunting mostly during twilight hours and at night, mountain lions are ambush predators. They sit-and-wait, often in concealment, before launching a fast surprise attack.
With large paws and powerful hind legs, they’re sprinters that can run between 40 – 50 miles per hour.

Jumping Adaptation

Mountain lions can jump as high as seven queen-sized beds, stacked length-wise, end-to-end. This makes getting into trees easy and is an ambush asset.

Behavior

Traditionally thought to be solitary predators, biologists are currently studying complex family structures.
Mountain lions will reciprocally share kills within small communities controlled by dominant males.
Mountain lions can kill prey with a single bite to the neck, positioning teeth into the spinal cord between vertebrae.
These animals cache their meals. After a kill, they’ll bury the prey and continue visiting the carcass for up to a week.
Males use feces and urine to scent-mark a territory, often scraping leaves and grass into a pile and urinating on it.
Young males searching for territory are more likely to fight and cause livestock problems.
Mountain lion relocation causes territory disruption, resulting in aggressive behaviors, and conflicts with established males.

Vocalizations are Mostly for Family

Humans may never know about lion neighbors, partly because we don’t recognize their vocalizations.

With other animals, scent marking is the main mode of mountain lion communication. Within family units, mothers and kittens make a variety of noncat-like sounds.

Mothers make sounds to call for and locate kittens and kittens make distress calls that are answered by their mothers.

Purring may be sibling competition for food.

Caterwauling is used by females mostly in heat.

Diet

Mountain lions are obligate carnivores, they must eat meat to survive. Generally, they need to make one large kill (deer) every two weeks. However, females raising kittens may need to make more frequent kills – every three days.

For an adult, average daily meat consumption is up to 10 lbs.

Food sources include;

deer
fox
skunk
rabbits
coyote
raccoons
river Otter
bobcat
squirrels
woodrats
rats and other rodents
any animal it can catch including livestock and housepets

In a Sonoma County study,

75% of mountain lion diet was deer,

10% livestock, 10% feral and house cats,

and 5% small mammals.

Reproduction

Females reach reproduction age between one-and-a-half and three years. Occasionally couples are monogamous, but more often mountain lions mate with multiple partners. During mating, a couple will remain together for about a week. After mating, the males go back to their own territory.

Gestation is approximately 3 months.
Females will have litters of 1-6 cubs, with an average of about 2. They’ll give birth every 2-3 years.
Cubs are born blind.
Nursing lasts up to 3 months.
Cub survival rate is slightly over kitten one per litter.
Kittens have spots for up to about 2 1/2 years.
Females raise their kittens alone.
Only mothers and offspring spend time together in social groups.
Juveniles remain with their mother from 1 1/2 – 2 years, until she’s ready for her next litter.

When kittens are nursed, the mother will bring meat to them. As they get older, she takes them to kill sites. Older still, they begin hunting small mammals on their own.

Causes of Kitten Mortality

coyote
bear
hypothermia
wildfires
male mountain lions

Habitat Fragmentation A Breeding Problem

Southern California mountain lion studies reveal that male lions must have the ability to safely move between wide swaths of land to access and breed with diverse female populations.

With movement constricted by busy freeways, inbreeding occurs. This genetically weakens populations.

Mountain lion inbreeding tail deformities — Crooked tails are a genetic defect from inbreeding. Article: Genetic Connectivity Threatens a Southern California Puma Population by Ernst, Vickers, Morrison & Boyce

Experts believe if inbreeding continues, the Southern California mountain lions will go extinct within in the next 50 or 60 years.

Life Span

In the wild, the average mountain lion life span is between 8-13 years. In captivity, they’ve been known to live up to 21 years.

Predators & Threats

Genetic isolation & inbreeding (habitat fragmentation).
Rodenticides (rat and mouse poisons) traveling up through the food chain. (In a study of 400 mountain lion necropsies, 95% showed some degree of poisoning.)
As habitats are encroached upon by humans, mountain lions are coming in contact with and susceptible to feline leukemia, rabies, and other infections.
Cars (roadkill).
Man and kill permits.

Nevada County Mountain Lion Kill Permits 2011-2019

Nevada County Mountain Lion Depredation Statistics 2011-2019 PDF

What Humans Can Do to Successfully Live in Lion Territory

Since we live in mountain lion territory, we should always assume we have an invisible mountain lion in our backyard and behave accordingly.

Don’t use anticoagulant rodenticides.
Value and support local and state policies aimed toward mountain lion conservation.
Never feed deer or other wild animals and encourage neighbors to do the same. (Wild animals who’ve lost natural fear of humans become a public safety issue, resulting in animal extermination.)
Fire safety – removing dense, low-lying vegetation close to your house – is identical for mountain lion safety.
Plant deer-resistant plants.
Consider outdoor automatic lighting.
Reduce driving speeds in wildlife zones, being especially from dawn to dusk.
Don’t litter and/or pick up roadside litter.
Don’t leave pet food outside.
Secure garbage on pick-up days.
Don’t let pets roam free.
Train guard dogs to watch-over livestock.
Build mountain lion resistant (very tall) livestock shelters.
Don’t put meat in compost piles.
Establish wildlife passage corridors to accommodate animal migration and movement.

Prevent Mountain Lion Encounters

Hike in groups.
Carry sticks.
Don’t bend down to tie shoes.
Make lots of noise.
Keep children walking in front of adults and within sight.
Carry pepper spray.
Keep dogs leashed. (A loose, running dog stimulates mountain lion chase behavior. If under pursuit, your pet will bring the chase straight to you!)