Longest duck call

According to Official Guinness Records,

The longest duck call measured 1.43 m (56.3 in) and was made by Damen Hillery and Mark Hillery (both USA) in Danville, Illinois, USA, and was measured on 30 October 2013.
The duck call constructed by Damen and Mark replicates the call of a mallard hen.

For a complete list of 2013 records, please visit 2013 Guinness Records in United States.

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