swan mark
noun1
The notch made on a swan's upper mandible when it is counted during the swan upping procedure.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
The notch made on a swan's upper mandible when it is counted during the swan upping procedure.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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