Meaning
To pursue a mistaken line of thought, blame the wrong person, or direct effort at completely the wrong target while believing it to be correct.
It is used to tell someone, often quite bluntly, that their current suspicion, approach, or assumption is based on a false premise and will not lead anywhere useful.
Origin
The phrase comes from hunting dogs that, during a night pursuit, lose track of their prey’s actual scent and end up barking at the base of a tree where they mistakenly believe the animal is hiding, when in fact it has already escaped elsewhere. The image of confident, noisy effort aimed at entirely the wrong spot made the phrase a natural metaphor for any mistaken accusation or misguided approach.
Examples
If you think I broke the vase, you are barking up the wrong tree, I was not even home.
The detective spent weeks barking up the wrong tree before finally questioning the real suspect.
Investors kept barking up the wrong tree, blaming the marketing team for problems caused by the product itself.
A: I bet the intern deleted the files by accident.
B: You are barking up the wrong tree, it was a server error.
Frequently asked questions
What does 'Barking up the wrong tree' mean?
To pursue a mistaken line of thought, blame the wrong person, or direct effort at completely the wrong target while believing it to be correct.
It is used to tell someone, often quite bluntly, that their current suspicion, approach, or assumption is based on a false premise and will not lead anywhere useful.