Black Walnut

Black walnut (Juglans nigra) contains juglone. There have been no  reports of toxicity in HUMANS from ingestion of parts of this tree. Ingestion of parts of the black walnut has caused toxicity in HORSES.

Juglone has produced sedative effects when administered  intravenously to experimental animals.

It is unlikely that ingestion of small amounts of the wood/bark of  Black Walnut would cause toxicity in birds. The ripe nuts may be given to birds to eat. With walnuts, always crack open to check to ensure that they have not gone mouldy. Mouldy walnuts has caused serious toxicity in dogs and are potentially toxic to birds.

Gillian Willis
Vancouver, B.C.

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Copyright © Gillian A.Willis. Permission to re-use any part of this text (whole or in part) must be obtained from the author.