Sunday, September 13, 2015

Ferruginous Spider Wasps Battle Over Spider, Burrow

Here two female Ferruginous Spider Wasps (Tachypompilus ferrugineus) battle over two prizes--an excellent burrow site in the concrete foundation of our back porch and a paralyzed spider.

Off camera, the loser flies away & sits under my truck.   On camera, the winner carries the spider a few feet along the foundation.   After grooming herself extensively, she checks out her burrow, retrieves the spider, and disappears into her nest site.   Meanwhile, a fourth character, never quite clear, follows behind & even enters the burrow.   My superhero Dr. Bugman (aka Ph.D. entomologist Dick Beeman) suggests that the shadowy figure could be the mate of the doomed spider--following her pheromone trail.    The smaller wasp at the end could be the mate of our leading lady.  Indeed, the males of this species are smaller than the females.

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