Monday, December 1, 2008
December Theme Day: Circles/Spheres
The oak tree next to my house regularly produces oak galls like this one, which eventually fall to the ground. Nicknamed "oak apples", they are formed by the tree in response to irritation under their bark by tiny insects called gall wasps. The wasp larvae mature in the spongy interior of the gall until it is time to burrow out and fly away. You may be able to spot several circular exit holes on this nearly spherical, tennis ball sized gall.
One of the foremost scholarly biologists of gall wasp populations was Dr. Alfred Kinsey, who later applied his training and insights in biological data collection and analysis to creating the then-new scientific field of human sexuality, and ultimately The Kinsey Institute. Apparently the wide variety of gall wasp sexual behaviors caused him to speculate about possible variations in humans.
On the first day of each month, many City Daily Photo Bloggers around the world post a photo tied to an agreed upon theme. To see all the beautiful, creative, and surprising responses to the theme of "Circles/Spheres," click here to view thumbnails and links for all the participants.