Mark Eastburn

Mark Eastburn

Villanova, PA

Princeton High School

Science Teacher


Published on Feb 23, 2015

That darn spider I couldn't find

Before I found Frigga crocuta, this other species of (possibly) vegetarian spider, I had originally set out to study all of the known species of Bagheera, which were two when I started (Bagheera ki...

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Published on Jan 31, 2015

One hypothesis confirmed?

I just received word yesterday on the results of a stable isotope analysis performed at The Academy of Natural Sciences of Drexel University in Philadelphia, and a preliminary revie...

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Published on Jan 24, 2015

The first, tantalizing signs of something special!

Ignoring the multiple ant stings on my finger, I want to direct your attention to the vials sitting on the laboratory bench behind. These were primarily samples that I collected in ...

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Published on Jan 16, 2015

Blue morpho in the bathroom!

In case the video doesn't come up, you can always click on the link below: all the places that I might expect to see a blue morpho butterfly, the men's bathroom at La...

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Published on Jan 09, 2015

Baby monkey makes a big leap!

Original video here!It was getting dark in Palo Verde, and I knew I didn't have much time to find more Bagheera spiders before the light became too dim to see. My main focus was on the Vachellia pl...

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Published on Jan 07, 2015

Preparing the first spider samples for stable isotope analysis

Preparing the first spider samples for stable isotope analysis.

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Published on Jan 07, 2015

A "sling"of Frigga crocuta on a Vachellia plant

A nest, or "sling," of Frigga crocuta on a Vachellia plant. These look nearly identical to the slings of Bagheera kiplingi in Mexico.

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Published on Jan 07, 2015

Two neighbors: the tamanduas

While searching for Bagheera kiplingi in Palo Verde, Costa Rica, I discovered plenty of fascinating neighbors, including these two tamanduas!

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Published on Jan 07, 2015

The first specimen I collected: Frigga crocuta

Here was the first specimen of Frigga crocuta that I collected from a Vachellia collinsii in Panama. Though it nests on Vachellia plants and behaves very much like Bagheera kiplingi...

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Thank you very much, Aaron! I really appreciate the support!
Thank you so much for your support! Science really is cool!
Thank you so much, Felix and family!
It took me a few hours of carful searching to find them for the first time, but once you start seeing them, they keep popping up! Thank you for your support, Brad. Go, science, too!
Thank you so much, Debi. These are good spiders, too :)
Thank you so much Carly! I hope you're enjoying Florida!
Will do! Thank you very much!
Thank you so very much! I am grateful for your support, and I am happy that your children enjoy my classes.
Thank you very much for your support!
Thank you, Daniel, for your support. These salticids really are fascinating!
Here's a link to the original video:
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