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Non tutte le cicogne che vivono in Svizzera migrano in inverno: quest’anno poco meno della metà ha scelto di rimanere in loco. Dal Lago di Costanza a quello di Ginevra, Cicogna Svizzera (la società svizzera a sostegno di questi uccelli) ha contato 1’041 cicogne durante il suo nono censimento invernale.
Nonostante le temperature sotto lo zero, molti volontari sono rimasti a disposizione fino al tramonto del 4 gennaio per contare le cicogne, ha riferito sabato l’associazione. A volte il terreno era ancora leggermente coperto di neve, rendendo gli animali difficili da rilevare.
Secondo i dati forniti da Cicogna Svizzera, quest’anno il 48,1% delle coppie riproduttive svernerà nella Confederazione. Lo scorso inverno erano rimaste nel Paese 912 cicogne, pari al 47,5% della popolazione di cicogne dell’epoca. Il picco in quest’ambito è stato registrato nell’inverno 2020/2021: più della metà delle cicogne ha trascorso l’inverno in Svizzera.
RG 08.00 del 27.07.2021 Il servizio e l'intervista di Alessia Fontana
RSI Info 27.07.2021, 10:01
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