Western Oregon is a hotspot of endemic mammal diversity and the ranges of many species meet here in Columbia County. Unfortunately, several have become quite rare. Forest species struggle due to the logging of the older forest and destruction of the natural forest understory; lowland species due to the spread of development throughout flat river bottomlands.
Two other carnivores which may have been found in Columbia County are the American Marten and the Fisher. Both appear to be absent now, likely due to the loss of adequate forest cover.
13 thoughts on “Mammals of Columbia County, Oregon”
Nice site and good information. However, you are missing at least one species (spotted skunk), and there are no records of tree voles in Columbia County, despite quite a few surveys that were conducted in that region. So, I would say that and tell people that if they find one, please report it!
Thanks Eric! What’s the source for Spotted Skunks making it into Columbia County? I couldn’t find any records.
And Matt himself found a resin duct clump under a Doug Fir stand on the western edge of the county, with me standing next to him when he found it, and has reported it to Oregon Conservation Strategy. 🙂
Thank you for sharing, they’re actually at the very end of the rodent section, right above shrews and moles. They are very cool creatures! Each mountain beaver builds a network of burrows in a moist hillside, you don’t see them out very much because they like to stay as close to their burrow network as possible. They cut down ferns and young shoots and other moist vegetation to eat, and will often drag some back to their burrow entrance to store.
I saw a marten about 30 feet from my house about 11 AM this morning(3-17-23). This was in Scappoose near a mandatory wetlands area. It didn’t seem bothered by all the houses around it so we watched for about for about 10 mins until it moved on down the road.
Positive. I had a trap line when I was in high school and caught several mink. I’ve seen river otters on Hwy 47 but the marten looked different, especially the tail and the way an otter kind of arches its back when it is running. At first I thought I was seeing a young cougar as I’m guessing it was about 12 -15 kilos but this animal was a very dark brown. The tail looked similar to a cougar’s except it was dark brown and a bit thicker. I watched for several minutes and then snuck out the front door, walked around the corner and whistled. He turned toward me and I immediately knew what it was when I saw the chest markings. It didn’t appear excited or jittery while wandering around. He spent a few minutes sitting by the water clean out drain on the edge of the wetlands area. After discussing with the county extension office and looking at several pages of pictures I am convinced it was a pine marten. I’m not looking to brag or anything but just wanted to share the news. One of the things I thought weird was that he was walking around in a subdivision at 11AM.
After doing more research about the marten I am somewhat perplexed. The animal we saw had a tail at least 18″ long and had to weigh more than 15 lbs. Both of those figures are outside the description of a pine marten.
No. That wolverine is supposedly on an island within 10 miles of where we saw what we now believe to be fishers. Someone sent this to the PDX TV stations and the TV report at noon today(Thurs) claimed it was the state game people that took the picture. I believe that part of the report is false as a friend was sharing a cup of coffee with me on Tues afternoon and showed me this picture while we were talking about the fishers. Our thought was that if two extremely rare mammal species/varieties are seen, on the same day, in public places located less than 10 miles apart, with no apart fear of houses and people then either there was an escape from a private animal reserve or someone brought them here and purposely dumped them along the river(especially the fishers). and yes, plural means more than one was seen in the same place early Tues morning.
Nice site and good information. However, you are missing at least one species (spotted skunk), and there are no records of tree voles in Columbia County, despite quite a few surveys that were conducted in that region. So, I would say that and tell people that if they find one, please report it!
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Thanks Eric! What’s the source for Spotted Skunks making it into Columbia County? I couldn’t find any records.
And Matt himself found a resin duct clump under a Doug Fir stand on the western edge of the county, with me standing next to him when he found it, and has reported it to Oregon Conservation Strategy. 🙂
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We have trapped a number of mountain beaver on our property. I don’t think I’m seeing them on your list. I’d like to know more about them!
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Thank you for sharing, they’re actually at the very end of the rodent section, right above shrews and moles. They are very cool creatures! Each mountain beaver builds a network of burrows in a moist hillside, you don’t see them out very much because they like to stay as close to their burrow network as possible. They cut down ferns and young shoots and other moist vegetation to eat, and will often drag some back to their burrow entrance to store.
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I can to find out about the little rabbit I have seen a few times. Brush Rabbit. Thanks.
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No problem!
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I saw a marten about 30 feet from my house about 11 AM this morning(3-17-23). This was in Scappoose near a mandatory wetlands area. It didn’t seem bothered by all the houses around it so we watched for about for about 10 mins until it moved on down the road.
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That would be an incredible sighting. You’re certain it wasn’t a mink or long-tailed weasel?
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Positive. I had a trap line when I was in high school and caught several mink. I’ve seen river otters on Hwy 47 but the marten looked different, especially the tail and the way an otter kind of arches its back when it is running. At first I thought I was seeing a young cougar as I’m guessing it was about 12 -15 kilos but this animal was a very dark brown. The tail looked similar to a cougar’s except it was dark brown and a bit thicker. I watched for several minutes and then snuck out the front door, walked around the corner and whistled. He turned toward me and I immediately knew what it was when I saw the chest markings. It didn’t appear excited or jittery while wandering around. He spent a few minutes sitting by the water clean out drain on the edge of the wetlands area. After discussing with the county extension office and looking at several pages of pictures I am convinced it was a pine marten. I’m not looking to brag or anything but just wanted to share the news. One of the things I thought weird was that he was walking around in a subdivision at 11AM.
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After doing more research about the marten I am somewhat perplexed. The animal we saw had a tail at least 18″ long and had to weigh more than 15 lbs. Both of those figures are outside the description of a pine marten.
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Hey Ron any chance it looked like this;
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No. That wolverine is supposedly on an island within 10 miles of where we saw what we now believe to be fishers. Someone sent this to the PDX TV stations and the TV report at noon today(Thurs) claimed it was the state game people that took the picture. I believe that part of the report is false as a friend was sharing a cup of coffee with me on Tues afternoon and showed me this picture while we were talking about the fishers. Our thought was that if two extremely rare mammal species/varieties are seen, on the same day, in public places located less than 10 miles apart, with no apart fear of houses and people then either there was an escape from a private animal reserve or someone brought them here and purposely dumped them along the river(especially the fishers). and yes, plural means more than one was seen in the same place early Tues morning.
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I’m glad you shared! If you can get a picture that would be fantastic data. I hope other people are on the lookout too.
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