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Native Californian, biologist, wildlife conservation consultant, retired Smithsonian scientist, father of two daughters, grandfather of four. INTJ. Believes nature is infinitely more interesting than shopping malls. Born 100 years too late.
Showing posts with label long-eared chipmunk. Show all posts
Showing posts with label long-eared chipmunk. Show all posts

Sunday, November 4, 2012

Long-tailed weasel and rodent cornucopia

A long-tailed weasel (Mustela frenata) checks out the castoreum stain left as a scent lure.


Yuba River (North Fork) drainage, Sierra County, California

I wasn't expecting miracles at set 574, but it always seems like a miracle when I camera trap a weasel. Especially a blue-eyed weasel. (Just kidding, folks; those pretty blue peepers are the reflection of the camera's flash from the eye's tapetum lucidum).

This weasel sniffed the castoreum just long enough for a single photo.

The set was under a boulder on a steep slope in red fir forest.  A few de-scaled pine cones identified it as an undercover messhall.

The camera snapped 431 photos in 33 days, but 60% were blank images most probably triggered by fleet-footed rodents.


Long-eared chipmunk (Neotamias quadrimaculatus)


















Possibly a brush mouse (Peromyscus boyleii)






Deer mice and long-eared chipmunks accounted for most (=80%) of the wildlife photos.





Long-tailed vole (Microtus longicaudus)
shows its bicolored tail







A bright-eyed long-tailed vole posed nicely for one photo,

Northern flying squirrel, a meat eater






and northern flying squirrels left 13 images during three visits.




Chickaree (Tamiasciurus douglasii

Chickaree's visited 10 times and left 14 photos.

Even the deer mice sniffed the castoreum.




Every species of mammal left at least a few self portraits while sniffing the irresistible castoreum.

The stuff is a truly broad-spectrum attractant for mammals and indispensable to this camera trapper.


I can't identify the only critter that ignored the scent lure.

The best of three photos of the "mystery chick".


At first I thought it was a scruffy molting wren.

But now I wonder if it's a chick of a blue (sooty) grouse, mountain quail, or even a sora rail?

Early September would seem a bit late for a chick, no?

Any opinions out there?