I am interested in bird migration, with a particular focus on internal factors related to behavioural decisions during stopover. Migrant birds spend approximately 80% of overall migration at stopover sites, i.e. areas particularly suitable for recovery and replenishment of energy reserves. I am studying whether body condition of birds at arrival influences recovery patterns including sleep at the stopover site. The study is conducted on the Island of Ponza (Italy), one of the most important stopover sites after the crossing of the Mediterranean Sea during spring migration.