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Il canto degli uccelli è il preludio della stagione degli amori. Con i vocalizzi i maschi difendono il loro territorio dai rivali e attraggono le femmine. Gli storni -per esempio-hanno una strategia di seduzione particolare: si esibiscono in imitazioni del canto di altre specie per distinguersi dai concorrenti.
Per osservare e ascoltare la sinfonia dei volatili bisogna muoversi lentamente, non far rumore e pazientare.
La primavera segna anche il ritorno degli uccelli migratori. Una visita alla stazione ornitologica di Sempach permette di scoprire l’avifauna della Svizzera e di allenarsi nel riconoscere i volatili anche dai loro canti.
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