Supplementary material from "Migrating ospreys use thermal uplift over the open sea"

Most large raptors on migration avoid crossing the sea because of the lack of atmospheric convection over temperate seas. The osprey null Pandion haliaetus null is an exception among raptors, since it can fly over several hundred kilometres of open water. We equipped five juvenile ospreys with GPS-Accelerometer-Magnetometer loggers. All birds were able to find and use thermal uplift while crossing the Mediterranean Sea, on average 7.5 times per...