Large bodies of water represent major obstacles for the migration of soaring birds because
thermal updrafts are absent or weak over water. Soaring birds are known to time their water …

During spring migration, a few tens of thousands of European Honey-buzzards wintering in
sub-Saharan Africa cross the central Mediterranean to reach their breeding grounds in …

The merlin (Falco columbarius) is a Holarctic species with a large range and population
size. In the Western Palearctic most populations are migratory, breeding in Northern Europe …

This book is the result of a search for answers. Throughout several years observing
migratory raptors crossing mountains, seas and deserts we generated countless questions …