Bird v Holbrook

• The defendant, having suffered losses from trespassers stealing flowers from his garden, set a concealed spring gun
• No warning notice of this trap was given
• The plaintiff, entering the garden in pursuit of an escaped fowl (a trespasser, though not for theft), triggered the gun and was seriously injured
• The plaintiff sued for this injury

1. Whether a defendant's use of a concealed, undisclosed lethal trap against trespassers is excused by the trespasser's own initial wrongful entry.

• The plaintiff's trespass, though itself wrongful, did not excuse the defendant's disproportionate, undisclosed response
• Setting a concealed spring gun without warning exceeded any reasonable, proportionate protective measure
• The defendant was held liable for the resulting injury
• A landowner's right to protect property does not extend to inflicting undisclosed, excessive harm on trespassers

A plaintiff's own wrongful conduct does not automatically excuse any and all responsive conduct a defendant might inflict. Where the defendant's response is itself excessive, undisclosed, or disproportionate to the wrongdoing it responds to, the defendant remains liable notwithstanding the plaintiff's own initial wrong.