I notice various small animals as I cycle the backroads around here (western Oregon). Squirrels, mostly, but also skunk, raccoon, possum, and even the occasional rabbit. Squirrels are native, the brown ones anyway, I’m not sure the grey ones are, but how many of the others?
Are there any other small animals native to this area? Mammals large than rats, that is.
Sure - most of them. You have some introduced critters like the ubiquitous East Grey and Fox Squirrels. But most small mammals you see in non-urban areas will be native. It’s not like the PN is a particularly difficult habitat :).
OK, I should have remembered beaver. Never see any while cycling, though.
According to that page, possum is not native, ditto for nutria. The PN is an easy habitat, but that makes it real easy to introduce foreign animals. I was mostly wondering which had been introduced.
I’ve only seen a couple of beavers, at least what I can confirm as beaver. Nutria have pretty much overrun the habitat but the tails are distinct. The Pacific Northwest can get cold in winter, mammals unsuited for extended freezing weather won’t survive. But otherwise yes, I like to characterize plant growth here as violent west of the Cascades. Either you sweep your roofs or you mow your roofs, can’t have Douglas Firs growing up there …
Are there any others besides nutria and possum that are not native? I’ve long wondered about raccoons. They always seemed to be an eastern critter that perhaps was introduced by early settlers bringing in pets. That may be a mistaken impression on my part, though.
But in addition to the two squirrel species I listed above and excluding larger animals like feral pigs, there is the Holy Rodent Trio ( Norway Rat, Black Rat, House Mouse ) and the Eastern Cottontail. Also the Red Fox - in western Oregon it appears to have been a natural expansion of native stock westwards from the Rockies, in western Washington apparently it was more deliberate and included European imports.
ODFW lists feral pigs as an invasive species. Here, “invasive” means damaging, so the nutria and opossum aren’t listed.
ETA: Humans? Serious, there’s signs on the Idaho border about how illegal it is to import damaging invasive species, I always want to stop and kick everyone out of my rig.