Frog and Friend

I set up a frog habitat at the science center and decided I'd better get some pond water for our little friend.  I scooped up a pail of water from our local lake and was so surprised to see this creature!  It is in the bottom photo and it is a kind of aquatic insect called a Water Scorpion.  It is not a real scorpion.  It is about 3 inches long and covered with green, moss. Its tail is used to obtain air from the water's surface, much like a snorkel.  Here is more on the Water Scorpion at this site:

A Water Scorpion

http://www3.northern.edu/natsource/INVERT1/Waters1.htm