Mountain Lions in Oregon: The Biggest Predator You Never See

Carnivores, Creature Feature, Uncategorized

Just how likely are you to run into a fierce predator on your hike through a state park or national forest? Most of us assume it’s unlikely. The image that comes to mind is of rainforests or savannas housing tigers, lions and cheetahs. Those are half a world away from us, but that doesn’t mean they aren’t there.

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With a distribution over two continents and the ability to adapt to a variety of climates, the mountain lion could be considered king of the American jungle. This species is the most widely distributed mammal in the Americas, with 30 subspecies and a bundle of common names including the cougar, puma, and panther. Mountain lions are on the bigger end of the smaller cats, weighing around 120-190 lbs. Their tan and reddish fur provide good cover in the trees and rocky mountains of both North and South America, while their classic felid jaws and claws aid in their ambush method of hunting of which there is a 70% success rate. Like most other cat species mountain lions are solitary animals, with the exception of mating and females with cubs.

Worldwide mountain lions are a species of least concern by the IUCN Redlist with an overall estimation of 30,000 individuals, but their numbers are starting to decrease. In fact, they aren’t found in the Eastern United States, after being hunted out in the last 200 years. The Pacific Northwest has a good portion of the United States’ mountain lions, with numbers around a few thousand in each state. They don’t appear to be limited by human activity, but rather by the amount of prey species available. In Oregon, the mountain lion population is estimated at 6,400 as of April 2017.

Each state monitors their populations in slightly different ways, and here the mountain lions fall under the Oregon Department of Fish and Wildlife (ODFW). Their goal is to keep the population above the 1994 level of 3,000 individuals. They also monitor the number of conflict animals in the state, or animals that cause damage to people’s property or person. These animals will be removed if necessary, and if the number of conflicts is too high or the prey species are suffering losses from too many mountain lions ODFW is prepared to adjust the population. In other words they want a stable population of mountain lions, not too many or too few.

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In addition to monitoring the population status ODFW sets hunting regulations for the state. Mountain lions are listed as a big game species in Oregon, and are hunted using the same tag system as other big game. Hunters can take both males and females during the mountain lion season, but mothers with cubs are off limits. In the past it was legal to use hunting hounds to tree a lion, or track and corner a mountain lion in a tree. However, using hounds for hunting a mountain lion is illegal for sport hunters, which has lowered the success rates of mountain lion hunting in the state. There is some speculation that this could have caused an increase in the population, but as of now there is no research to support the theory.

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That’s not to say there is a lack of mountain lion research in Oregon, not by a long shot. There have been over a dozen research publications affiliated with ODFW in the last decade alone. They include subjects like establishing more accurate mountain lion densities and population growth rates, effects of lethal control, kill rates and prey selection, and the effects on population dynamics of elk (one of their prey species). In southwestern Oregon there was a long-term study from 1992-2003 that radio collared and captured mountain lions and gathered data on home ranges, prey interactions, reproduction, and dispersal. All of these pieces of research are important to the whole picture of the mountain lion-how it lives, factors that could affect its survival, and how to best live alongside one of our biggest top predators.

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So the next time you pick up your hiking boots, remember and respect the fact that you may not be as alone as you thought out there. Keep an eye out for tracks, because Oregon’s mountain lions can be seen if you know how to look.

Oregon Department of Fish and Wildlife. 2006. Oregon Cougar Management Plan. ODFW.

Oregon Department of Fish and Wildlife. 2015. Summary of Cougar Research in Oregon. ODFW Wildlife Division.

Oregon Department of Fish and Wildlife. 2015. Summary of Cougar Management in Neighboring States. ODFW Wildlife Division.

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