Assertion: trumpeter swan | /r/CapableOf | start breeding at the age of 4–7
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Source sentences:
text: Trumpeter swans, for example, who can live as long as 24 years and only start breeding at the age of 4–7, form monogamous pair bonds as early as 20 months.
text: Trumpeter swans, for example, who can live as long as 24 years and only start breeding at the age of 4–7, form monogamous pair bonds as early as 20 months.