By Larry ChaseThey’re b-a-a-a-a-ck! From the Massachusetts Audubon Society website: “Turtles are frequently seen basking in the sun on logs, rocks, or embankments. This behavior serves many purposes, including helping to promote muscle activity and digestion, encouraging leeches and other parasites to drop off, and triggering the production of vitamin D, which is essential for strong shells” The septet here live in Andover’s Horseshoe Pond, and were photographed from the Northern Rail Trail on a warm day in early May.