To borrow from a Sesame Street song, one of these things just doesn't belong. In the January issue, on page 49, we published a picture of what we thought was an Emerald Ash Borer. But reader Michael Rushmer — superintendent of the West Allis (Wis.) Forestry and Grounds Division — knew better, and was kind enough to let us know. Can you tell which insect is not the Emerald Ash Borer?

Answer: C is a type of bee. There are nearly 20,0000 known species of bees in at least seven recognized families.