Sunday, November 15, 2020

Northern Black Widow

Blue Jay Barrens is located in a part of Ohio that has an ever increasing population of Whitetail Deer.  As a result, I commonly find deer bones, particularly skulls.

Skulls tend to remain intact longer than any other part of the deer skeleton.  This longevity makes the weathered skull an ideal living space for a variety of small animals.  In this case the brain cavity is being used by a spider.

Closer examination shows the occupant to be a Black Widow.  I have found several of this type of spider and in every case they have been living inside an old deer skull.

The spider kept moving around and finally positioned itself with the ventral (underneath) surface facing in my direction.  The red markings on the abdomen allowed me to identify this specimen as a female Northern Black Widow, Latrodectus variolus.

Another view of the ventral surface showing the trademark red hourglass shape.  The top and bottom sections of the hourglass on the Northern Black Widow are separated by a black band.

The Northern Black Widow displays a variety of red markings on the dorsal (upper) surface of the abdomen.  The spider is upside down in this view.  A red stripe begins at the spinnerets and continues along the center line of the abdomen.

The red stripe transitions into a series of red spots, making for quite an attractive spider.

I found this spider living on a dry, south facing slope.  This provides the warm, dry conditions preferred by the Black Widow.  All of my Black Widow encounters have been in this same type of habitat.  Following my photo shoot, the deer skull, with spider alive and well inside, was replaced as it was originally found.


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