If you haven’t ever gone to see a Purple Martin roost, you must go! There are no words to describe 50,000 to 100,000 birds arriving in waves at sunset. Somewhere in this huge flock are 120 babies! Credit for this picture goes to the Purple Martin Conservation Society Forum. The site used for this radar is picturhttp://vortex.plymouth.edu/nids.htmle is . The person creating the radar picture is confidential.