[1] Ist Super Protez & Ric Ambientale ISPRA, Area Avifauna Migratrice BIO AVM, Ozzano Dell Emilia, Italy
[2] Univ Milano Bicocca, Dipartimento Biotecnol & Biosci, Milan, Italy
[3] Natl Biodivers Future Ctr, Palermo, Italy
[4] Via L B Alberti 8-A, Cinisello Balsamo, MI, Italy
[5] Univ Milano Bicocca, Dipartimento Sci Ambiente & Terra, Milan, Italy
[6] World Biodivers Assoc Onlus, NAT LAB Forte Inglese, Portoferraio, LV, Italy
[7] Ctr Ric Ornitol Scanagatta, Varenna, LC, Italy
[8] Odonata It Soc Italiana Studio & Conservaz Libellu, Perugia, Italy
[9] Via Statale 77ter, Merate, LC, Italy
[10] Via Cherubini 7, Paderno Dugnano, MI, Italy
[11] Odonata It Soc Italiana Studio & Conservaz Libellu, Perugia, Italy
[12] Grp Insubr Ornitol, Clivio, VA, Italy
[13] Studio Tu GA Tutela & Gest Ambientale, Rovello Porro, CO, Italy
[14] Elitron, Milan, Italy
[15] Via Salerno 12, Lecce, Italy
[16] Museo Civ Storia Nat Morbegno, Morbegno, SO, Italy
[17] Univ Torino, Dipartimento Sci Vita & Biol Sistemi, Turin, Italy