Laburnum is a buck from Cowslip's warren. He is an artist, as he drew the shape of El-ahrairah. He is mentioned by Strawberry when she shows Hazel the picture. His name in Lapine means, "Poison Tree", and it's mentioned that putting "poison" in a name is un-rabbitlike. His traits are also very un-rabbitlike, just to show how human-inspired the Warren of Snares is. His art is seen as old-fashioned because the rabbits in Cowslip's Warren don't use their skills of cunning and survival.