Posts Tagged ‘squirrels’

by , Director
I've been at the Museum sooooo long - longer than many of our interns have been alive. I do a little bit of everything as part of my job: care for the animals, work with the keepers and other staff, spend time with guests. Lucky me!
I spend a lot of time behind-the-scenes, or here after hours, but if you really want to see me, you'll have to sign-up for a behind-the-scenes program.

Squirrel Appreciation Day

January 21st, 2012

January 21st is Squirrel Appreciation Day.  (I think the  wolves appreciate squirrels). I learned about this day too late last year so I have been waiting all year to write this post (and, to be honest, I almost forgot again). There’s an article and photos at Huff Post from last year to acknowledge the day (click here).  Michele Kloda, a member of the Museum’s research and development team, interviewed Michael Steele, Professor of Biology and H. Fenner Chair of Research Biology, Wilkes College, Wilkes Barre, PA and learned the following amazing information about squirrels:

  • Grey Squirrels maintain 2, 3, 4 or sometimes 5 nests in a given tree. Multiple nests provide multiple opportunities to hide from predators, as well as a clean home to move to once the ectoparasite (ticks, lice, fleas) load becomes too high.
  • Grey Squirrels and Blue Jays are the primary dispersal agents for oak forest regeneration across the North Eastern deciduous forest. Without the squirrel, there would be no oaks. Squirrels also disperse some hickory, Black Walnut and Beech. They prefer Northern Red and White Oaks but will disperse Pin and Willow Oaks.
  • Squirrels have evolved to hide (cache) acorns a few centimeters below the soil—the optimal location for germination. Scientists are just starting to piece together how the oaks have evolved to optimize their growth in response to squirrel behavior.
  • New research examines the chemistry of acorns—their tannin and fat levels. They have more lipid/fat content near the cap and more bitter tannins at the other (embryo) end. Squirrels and birds often eat just the tasty, fatty end, and leave behind the intact embryo. It will still germinate under the right conditions. Germination changes the chemistry of the acorn and makes it less tasty.   
  • Scientists have discovered that squirrels respond to germination schedules of oaks. White Oaks germinate in the fall. Before this happens the squirrels eat the seeds. And a side benefit–White Oak seeds tend to spoil faster than the Red Oak seeds.
  • Squirrels will cache White Oak seeds but they first bite off the embryo at the end of the acorn…then it won’t germinate or spoil for up to 6 months! (How do they know that?!?!)
  • Ask me how scientists ‘tag’ over 17,000 acorns and then record their ‘movement!’
  • If squirrels seem busy–they are! From fall to spring, they routinely ‘tend’ their underground caches. Squirrels will move buried acorns at a rate of every 48 hours! They are constantly visiting their cached seeds to check their freshness, recall their location (they use spatial cues to find them) and eat. If a seed is close to spoiling, they will eat or discard it
  • Finally, Michael’s latest research suggests that squirrels engage in deception—something that was thought to be unique to primates. Squirrels will pretend to dig a hole and pound down the earth as if burying an acorn, but then carry that acorn to a different location. They may engage in this pretend scenario several times with the same seed. The behavior is thought to throw off potential pilferers.

Join the conversation:

  1. Whew! You did it! Happy Squirrel Appreciation Day, everyone! What’s not to celebrate?!

    Posted by Michele

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by , Keeper
I have been working at the museum since 2003, and I feel fortunate to have a job where I can start my day with amazing animals surrounding me. I enjoy camping, hiking and rock climbing in my spare time when the weather is nice.
I work Tuesday through Saturday and spend a lot of time behind the scenes, but you might find me at a public program or feeding the farmyard animals in the afternoon.

Squirrels hoard acorns, and Kristen hoards our holiday candy…

December 16th, 2008

But at least she has nicer teeth.

Actually, hoarding acorns has been difficult for squirrels this winter due to an acorn shortage. You can click here to read more about it.

Join the conversation:

  1. Kristen, I just want you to know that for a whole day Kent had his hands in that bag before you stuffed all that candy in your mouth!!!!!!

    Posted by Katy
  2. Oh. My. Goodness.

    Posted by Leslie
  3. Wow, that’s not the case here in Raleigh. We have had more acorns this year in our backyard than any other year since we moved here. We’ve also seen several deer move through and a nice rub or two from a big buck!

    Posted by Brad
  4. Those are hilarious pictures!

    Posted by Wendy A
  5. I knew you had your hands full with the animals – didn’t realize you also had your mouths full!

    Posted by Wendy A

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