Would just be a guess on my part, but I think they will just hunker down and stay on their simular course. My birds 70 miles off the coast of MS didn't go around the storm. They stayed thru it all and Katrina lasted for a very long time. I had to use bottled water for the birds and myself after the hurricane because my water well would not work. Did not get electricity for 21 days. The well would not work on a generator because the pipe was broken right at the ground. Still kept feeding the birds.....